Making a Spanish noun plural is usually easy: you add -s or -es to the end. The tricky part is knowing which ending to use, and watching out for a handful of spelling and accent adjustments that follow from Spanish's stress rules. This page walks through the core rules step by step.
For the genuinely irregular cases — compound nouns, nouns that are always plural, Latin and Greek borrowings — see Plural Special Cases.
Rule 1: Ends in a Vowel → Add -s
If a noun ends in an unstressed vowel (a, e, i, o, u), just add -s for the plural.
Tengo dos libros nuevos y varias plumas azules.
I have two new books and several blue pens.
Las casas de la calle tienen jardines bonitos.
The houses on the street have pretty gardens.
Examples:
- casa → casas
- libro → libros
- mesa → mesas
- padre → padres
- estudiante → estudiantes
- tribu → tribus
This rule covers the majority of Spanish nouns, because most of them end in -a, -o, or -e.
Rule 2: Ends in a Consonant → Add -es
If a noun ends in a consonant, add -es for the plural. This keeps the word pronounceable and preserves the original stress.
Los árboles del parque son más altos que los hoteles.
The trees in the park are taller than the hotels.
Los doctores y los profesores trabajan juntos.
The doctors and the teachers work together.
Examples:
- árbol → árboles
- hotel → hoteles
- doctor → doctores
- profesor → profesores
- mes → meses
- reloj → relojes
- papel → papeles
Note that the stress stays on the same syllable in both forms — árbol and árboles, hotel and hoteles — and Spanish's written accents adjust if needed. That is the subject of rule 4.
Rule 3: Ends in -z → Changes to -ces
Nouns ending in -z change the z to c before adding -es. This is a purely spelling rule: the sound of the plural ending is the same as if it were -zes, but Spanish spelling does not allow z before e or i.
Los lápices de colores son muy útiles en clase.
The colored pencils are very useful in class.
Las veces que vi a Juan se cuentan con los dedos de una mano.
The times I saw Juan can be counted on the fingers of one hand.
Examples:
- lápiz → lápices
- vez → veces
- luz → luces
- pez → peces
- nuez → nueces
- raíz → raíces
- cruz → cruces
- voz → voces
- juez → jueces
For more on this spelling pattern, see the spelling rules (if available in your guide).
Rule 4: Accent Shifts
Because Spanish uses written accents to mark unusual stress, some plurals gain or lose an accent mark to preserve the original pronunciation. You do not need to memorize individual words — you just need to remember the principle: keep the stress on the same syllable in both forms.
Singular Has an Accent, Plural Does Not
Many nouns ending in -ión carry a written accent in the singular but drop it in the plural. The stress falls on the same syllable in both, but adding a new syllable (-es) turns the word from one that needed the accent into one that does not.
La canción y la lección terminaron; las canciones y las lecciones también.
The song and the lesson ended; the songs and the lessons too.
Examples:
- canción → canciones
- lección → lecciones
- corazón → corazones
- nación → naciones
- explicación → explicaciones
- inglés → ingleses
- francés → franceses
- alemán → alemanes
Singular Has No Accent, Plural Gains One
The reverse happens with some nouns whose natural stress is not on the final syllable. In the singular, the default stress rules keep them unmarked. In the plural, a new syllable shifts the count, and an accent is added to preserve the original stress.
Los jóvenes del grupo trajeron sus exámenes.
The young people in the group brought their exams.
Examples:
- joven → jóvenes
- examen → exámenes
- origen → orígenes
- imagen → imágenes
- margen → márgenes
- resumen → resúmenes
- virgen → vírgenes
- volumen → volúmenes
Summary Table
| Singular ends in... | Plural rule | Example |
|---|---|---|
| unstressed vowel (a, e, i, o, u) | add -s | casa → casas |
| consonant (other than -z) | add -es | árbol → árboles |
| -z | change z → c, add -es | lápiz → lápices |
| -ión (accented) | add -es, drop accent | canción → canciones |
| unstressed paroxytone ending in -n or -s | add -es, add accent | joven → jóvenes |
| stressed vowel (á, é, í, ó, ú) | add -es (rarely -s) | rubí → rubíes, café → cafés |
A Note on Stressed Vowels
Nouns that end in a stressed vowel (other than -e) are usually plural with -es, not -s: el rubí → los rubíes, el tabú → los tabúes, el hindú → los hindúes. The -s plural (rubís, tabús) is also accepted in modern usage, especially for loan words and recent borrowings.
Nouns that end in stressed -é or -á usually take -s: el café → los cafés, el sofá → los sofás, el papá → los papás, el mamá → las mamás.
Tomé dos cafés y vi tres rubíes en la joyería.
I had two coffees and saw three rubies at the jewelry store.
Gender Stays the Same
Making a noun plural never changes its gender. El libro becomes los libros; la mesa becomes las mesas. The article shifts to the plural form, but masculine stays masculine and feminine stays feminine.
Las casas, los libros y los gatos no cambian de género.
Houses, books, and cats don't change gender.
What Comes Next
For the trickier corners — compound nouns, nouns that are always plural or always singular, and tricky loan words — see Plural Special Cases. For a refresher on when and why stress marks appear, see Stress Rules.
Related Topics
- Plural Special CasesA2 — Irregular plural forms and edge cases for Spanish nouns
- Stress RulesA2 — The three rules that determine which syllable of a Spanish word is stressed