Spanish gender is not a logic puzzle, but it is not random chaos either. Once you know a small number of endings and categories, you can guess the gender of most new nouns correctly on the first try. This page collects the patterns that mark a noun as masculine — both the reliable letter endings and the fixed categories like days of the week, months, and languages.
The complement page, feminine patterns, covers the mirror-image markers for feminine. Together the two pages cover the vast majority of common nouns. For the stubborn exceptions that break these patterns — el día, el problema, la mano, la foto — see gender exceptions. If you have not yet read the overview, start there.
The big six masculine endings
Six endings reliably mark a noun as masculine. Learn these, and you can confidently default to masculine for nouns ending this way.
| Ending | Reliability | Examples |
|---|---|---|
| -o | very high | el libro, el perro, el dinero, el trabajo, el teléfono |
| -or | high | el amor, el calor, el dolor, el motor, el profesor |
| -aje | very high | el viaje, el mensaje, el paisaje, el equipaje, el garaje |
| -ón (not -ción/-sión) | high | el corazón, el limón, el botón, el balcón, el ratón |
| -ma (from Greek) | high for Greek roots | el problema, el tema, el sistema, el idioma, el clima |
| -l, -n, -r, -s (consonants) | moderate | el papel, el pan, el bar, el mes, el sol |
The rest of this page walks through each in detail.
Nouns ending in -o
The single most reliable masculine marker is the ending -o. The vast majority of nouns that end in -o are masculine. This is the everyday default and the first pattern to internalize.
El libro está encima del escritorio, al lado del teléfono.
The book is on top of the desk, next to the phone.
Mi perro y mi gato duermen siempre en el mismo sillón.
My dog and my cat always sleep on the same armchair.
He metido todo el dinero del viaje en el sobre blanco.
I've put all the trip money in the white envelope.
A small group of -o words are feminine and so frequent that everyone eventually memorizes them: la mano (hand), la foto (photo), la moto (motorbike), la radio (radio). These are covered in detail in gender exceptions. They are exceptions, not patterns — the -o ending is overwhelmingly masculine.
Nouns ending in -or
Nouns ending in -or are almost all masculine. This includes both abstract nouns (el amor, el dolor, el calor) and agent nouns describing people who do things (el profesor, el conductor, el escritor).
El calor del verano y el sabor del café me despiertan por las mañanas.
The summer heat and the flavour of coffee wake me up in the mornings.
Mi profesor de matemáticas es muy estricto pero buen profesor.
My maths teacher is very strict but a good teacher.
The main exception to memorize is la flor ("flower"), which is feminine despite the -or ending. A handful of others — la labor (work, labour), la coliflor (cauliflower) — are also feminine, but they come up less often.
Le he regalado una flor a mi madre.
I gave my mother a flower.
Nouns ending in -aje
Nouns ending in -aje are reliably masculine. The pattern is so strong that you can default to masculine for any -aje noun you encounter without hesitation. These often correspond to English words ending in -age, which is a useful learning aid for English speakers.
| Spanish | English |
|---|---|
| el viaje | trip / journey |
| el mensaje | message |
| el paisaje | landscape |
| el garaje | garage |
| el equipaje | luggage |
| el lenguaje | language (as a system) |
| el porcentaje | percentage |
| el pasaje | passage / fare |
| el aterrizaje | landing |
| el rodaje | filming / shoot |
El viaje fue largo, pero el paisaje valió la pena.
The trip was long, but the landscape was worth it.
Me ha llegado un mensaje raro desde un número que no conozco.
I got a strange message from a number I don't know.
Nouns ending in -ón (but not -ción or -sión)
Nouns ending in -ón are usually masculine — provided the ending is not part of -ción or -sión, which are feminine. This is the trickiest distinction in the system, because the surface ending -ón looks identical in both cases. The rule:
- -ón (preceded by anything other than c or s): masculine. el corazón, el limón, el botón.
- -ción / -sión: feminine. la canción, la decisión, la televisión.
El corazón del león es enorme.
The lion's heart is enormous.
Me he comido un limón entero, qué barbaridad.
I just ate a whole lemon, that's crazy.
Aprieta el botón rojo y se enciende.
Press the red button and it turns on.
Common -ón masculines include: el corazón (heart), el limón (lemon), el jamón (ham), el botón (button), el balcón (balcony), el camión (lorry), el ratón (mouse), el rincón (corner), el sillón (armchair), el escalón (step), el buzón (postbox), el algodón (cotton).
The Greek-origin -ma group (masculine despite ending in -a)
This is the famous gotcha of Spanish gender. A whole family of nouns ending in -ma is masculine, breaking the -a-is-feminine intuition. These words are almost all borrowings from ancient Greek, where the -ma suffix made neuter nouns; Spanish absorbed them as masculine. Once you recognize the pattern, the list starts feeling like a coherent group.
| Noun | English |
|---|---|
| el problema | problem |
| el tema | topic, theme |
| el sistema | system |
| el idioma | language |
| el clima | climate |
| el programa | programme |
| el drama | drama |
| el poema | poem |
| el síntoma | symptom |
| el esquema | scheme, outline |
| el dilema | dilemma |
| el diploma | diploma |
| el aroma | aroma |
| el panorama | panorama |
El problema es serio, pero tiene solución.
The problem is serious, but there's a solution.
El tema de la reunión es el nuevo programa de prácticas.
The topic of the meeting is the new internship programme.
El clima de Madrid es extremo: mucho frío en invierno y mucho calor en verano.
Madrid's climate is extreme: very cold in winter and very hot in summer.
Not every -ma word is Greek and masculine, though. La cama (bed) is feminine; la rama (branch) is feminine; la goma (rubber, eraser) is feminine. These are not from Greek roots. The masculine -ma rule applies specifically to the Greek scholarly borrowings, which is most of the abstract or technical -ma words you encounter.
Other -a-masculines (non-Greek)
A short list of high-frequency -a-ending words that are masculine for other reasons. Memorize them:
| Noun | English |
|---|---|
| el día | day |
| el mapa | map |
| el planeta | planet |
| el sofá | sofa |
| el tranvía | tram |
Hoy es un día precioso.
Today is a beautiful day.
Necesitamos un mapa nuevo del centro.
We need a new map of the city centre.
Nouns ending in consonants
Many Spanish nouns end in a consonant — -l, -n, -r, -s, -d, -z — and there is no single rule that covers them all. The patterns:
- -l, -n, -r, -s: usually masculine. el papel, el pan, el bar, el mes, el sol, el dolor, el árbol.
- -d: usually feminine. la verdad, la libertad, la pared, la juventud, la salud. (See feminine patterns.)
- -z: split — some masculine (el lápiz, el pez, el arroz), many feminine (la luz, la voz, la nariz, la paz).
El papel está en el cajón del escritorio.
The paper is in the desk drawer.
Me he comprado un pan recién hecho en la panadería.
I bought a freshly baked loaf at the bakery.
El sol entra por la ventana toda la mañana.
The sun comes through the window all morning.
¿Has visto mi reloj nuevo?
Have you seen my new watch?
The reliability for -l, -n, -r, -s is moderate — most nouns ending these ways are masculine, but there are real exceptions (la flor, la miel, la imagen, la sal, la nariz). When in doubt, default to masculine for these endings, then memorize the exceptions as you meet them.
Fixed masculine categories
Beyond endings, several whole categories of nouns are masculine regardless of how they end. Memorize these as groups.
Days of the week
All seven days of the week are masculine: el lunes, el martes, el miércoles, el jueves, el viernes, el sábado, el domingo.
El lunes trabajo y el sábado descanso.
On Monday I work and on Saturday I rest.
Los miércoles siempre quedo con Marta a tomar algo.
On Wednesdays I always meet Marta for a drink.
Note that los lunes, los martes (plural) refers to "Mondays, Tuesdays" in general — these days have identical singular and plural forms. El sábado / los sábados changes form like a regular noun.
Months of the year
All months are masculine: enero, febrero, marzo, abril, mayo, junio, julio, agosto, septiembre, octubre, noviembre, diciembre. Months are normally used without articles (en enero, en febrero), but if you do attach an adjective to one, the article and adjective are masculine.
Julio suele ser muy caluroso en Madrid.
July is usually very hot in Madrid.
Fue un enero frío y seco.
It was a cold, dry January.
Languages
Every language name is masculine: el español, el inglés, el francés, el alemán, el chino, el portugués, el italiano, el árabe, el ruso.
El español es la lengua oficial de más de veinte países.
Spanish is the official language of more than twenty countries.
Estoy aprendiendo el alemán, pero me cuesta horrores.
I'm learning German, but it's a real struggle.
(Note: la lengua — the word for "language" itself — is feminine. But the names of specific languages are all masculine. This is one of those distinctions that surprises learners.)
Colours used as nouns
When colour words are used as nouns (rather than as adjectives), they are masculine: el rojo, el azul, el verde, el amarillo, el negro, el blanco.
El azul es mi color favorito, pero también me gusta el verde.
Blue is my favourite colour, but I also like green.
El rojo del semáforo te obliga a parar.
The red of the traffic light makes you stop.
Rivers, seas, oceans, mountains
Names of rivers, seas, oceans, and mountains are masculine: el Ebro, el Tajo, el Guadalquivir (rivers); el Mediterráneo, el Cantábrico, el Atlántico (seas/oceans); el Everest, el Teide; mountain ranges as plural masculines: los Pirineos, los Picos de Europa.
El Ebro pasa por Zaragoza camino del Mediterráneo.
The Ebro flows through Zaragoza on its way to the Mediterranean.
Hemos hecho un viaje por los Pirineos este verano.
We did a trip through the Pyrenees this summer.
Compass directions
The four compass directions are masculine: el norte, el sur, el este, el oeste.
El norte de España es más lluvioso que el sur.
The north of Spain is rainier than the south.
Numbers as nouns
Numbers used as nouns are masculine: el uno, el dos, el siete, el cien.
Sacó un siete en el examen y se quedó contento.
He got a seven on the exam and was pleased.
Infinitives used as nouns
When a verb's infinitive is treated as a noun (like English "running, swimming" used as gerunds), it is always masculine.
El comer rápido es malo para la digestión.
Eating fast is bad for digestion.
Summary table
| Pattern / category | Examples | Watch out for |
|---|---|---|
| -o ending | libro, perro, teléfono | la mano, la foto, la moto, la radio |
| -or ending | amor, calor, dolor, profesor | la flor, la labor, la coliflor |
| -aje ending | viaje, mensaje, paisaje | (none common) |
| -ón (not -ción/-sión) | corazón, limón, botón | -ción, -sión = feminine |
| -ma (Greek) | problema, tema, sistema | la cama, la rama, la goma (not Greek) |
| -l, -n, -r, -s | papel, pan, bar, mes | la flor, la sal, la imagen |
| Days of the week | lunes, martes, sábado | none |
| Months | enero, febrero, julio | none |
| Languages | español, inglés, chino | none |
| Colours as nouns | el rojo, el azul, el verde | none |
| Rivers, seas, mountains | el Ebro, el Mediterráneo, los Pirineos | none common in Spain |
| Compass directions | el norte, el sur, el este | none |
| Numbers as nouns | el uno, el siete, el cien | none |
| Infinitives as nouns | el comer, el vivir | none |
Common Mistakes
❌ La problema es muy grande.
Problema ends in -a, but is masculine — Greek -ma group.
✅ El problema es muy grande.
Problema, tema, sistema, idioma, programa — all masculine.
❌ La día de hoy ha sido largo.
Día ends in -a but is masculine — one of the highest-frequency -a-masculines.
✅ El día de hoy ha sido largo.
El día is masculine despite the -a ending. Memorize it day one.
❌ La viaje fue genial.
-aje endings are reliably masculine; viaje is no exception.
✅ El viaje fue genial.
All -aje nouns are masculine: viaje, mensaje, paisaje, garaje.
❌ La canción es masculina porque acaba en -ón.
Mistaking -ción/-sión for -ón. The c or s before -ón flips the gender to feminine.
✅ La canción es femenina (-ción); el corazón es masculino (-ón).
Look at the letter before -ón: c/s makes it feminine, anything else masculine.
❌ La español es una lengua hermosa.
Language names are masculine, even though la lengua (language) itself is feminine.
✅ El español es una lengua hermosa.
El español, el inglés, el francés — language names are always masculine in Spanish.
Key Takeaways
- Six endings reliably mark masculine: -o, -or, -aje, -ón (not -ción/-sión), -ma (Greek), and most consonants.
- The Greek -ma family is the most famous exception to the -a-is-feminine rule: el problema, el tema, el sistema.
- -ción and -sión are feminine, not masculine — the c or s before -ón flips the gender.
- Fixed categories that are always masculine: days, months, languages, colours-as-nouns, rivers, seas, mountains, compass directions, numbers, infinitives-as-nouns.
- High-frequency -a-masculines to memorize separately: el día, el mapa, el planeta, el sofá, el tranvía.
- High-frequency -o-feminines (the mirror exceptions): la mano, la foto, la moto, la radio.
- For the full list of masculine endings, see this page; for feminine, see feminine patterns; for the rule-breakers, gender exceptions.
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Start learning Spanish→Related Topics
- Género de los sustantivos: visión generalA1 — Every Spanish noun is masculine or feminine — gender drives the article, the adjective, and the pronoun. An introduction for English speakers who have never met grammatical gender before.
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- Excepciones de géneroA2 — The high-frequency nouns whose gender breaks the usual ending rules — masculine -a nouns from Greek, feminine -o nouns, and the *el agua* class of feminine words that take a masculine article.
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