Synthetic Comparative in -τερος | Greek Grammar

Greek has a second comparative that packs "more X" into a single word. Instead of πιο ψηλός ("taller"), you can say ψηλότερος; instead of πιο ακριβός, ακριβότερος. This is the synthetic comparative, formed by growing a suffix onto the adjective's own stem — and unlike the analytic πιο, the resulting word is a real, fully-inflected adjective that agrees with its noun. It means exactly the same thing as the πιο form, but it reads as tidier and a touch more polished, which is why it dominates in writing and in the set phrases of everyday speech.

How it's built

Take the adjective, drop the masculine ending, and add -ότερος / -ότερη / -ότερο:

Positive	Comparative (m / f / n)	Meaning
ψηλός	ψηλότερος / ψηλότερη / ψηλότερο	taller
ακριβός	ακριβότερος / ακριβότερη / ακριβότερο	more expensive
όμορφος	ομορφότερος / ομορφότερη / ομορφότερο	more beautiful
έξυπνος	εξυπνότερος / εξυπνότερη / εξυπνότερο	cleverer
ζεστός	ζεστότερος / ζεστότερη / ζεστότερο	warmer

Adjectives ending in -ύς instead take -ύτερος, keeping their family's vowel: βαθύς → βαθύτερος (deeper), βαρύς → βαρύτερος (heavier), φαρδύς → φαρδύτερος (wider). Everything else about them is the same.

Ψάχνω ένα φθηνότερο εισιτήριο για την Πέμπτη το πρωί.

psáchno éna fthinótero isitírio ya tin Pémpti to proí

I'm looking for a cheaper ticket for Thursday morning.

Το δεύτερο διαμέρισμα ήταν φωτεινότερο και πιο ήσυχο.

to dhéftero dhiamérizma ítan fotinótero ke pio ísicho

The second flat was brighter and quieter.

Θέλω ένα ελαφρύτερο φαγητό το βράδυ, δεν πεινάω πολύ.

thélo éna elafrítero fayitó to vrádhi, dhen pináo polí

I want a lighter meal in the evening — I'm not very hungry.

Notice the second sentence pairs a synthetic comparative (φωτεινότερο) with an analytic one (πιο ήσυχο) in the same breath. That is completely normal Greek — speakers mix the two freely, choosing whichever sounds better on a given adjective.

The accent lands on the suffix — always

Here is a gift that makes this form easy to spell. The ending -ότερος is three syllables long (ό-τε-ρος), and because Greek won't let the stress fall further back than the third-from-last syllable, the accent is forced onto the -ό- of the suffix, no matter where it sat in the original adjective. So έξυπνος (stressed on έ) becomes εξυπνότερος (stressed on -ό-); όμορφος becomes ομορφότερος. You never have to wonder where the accent goes: on -ότερος it is the ό, on -ύτερος it is the ύ.

Η καινούρια υπάλληλος είναι γρηγορότερη από όλους μας.

i kenúria ipálilos íne ghrighoróteri apó ólus mas

The new employee is faster than all of us.

Φέτος ο χειμώνας είναι ψυχρότερος και πιο υγρός.

fétos o chimónas íne psichróteros ke pio ighrós

This winter is colder and damper.

It declines like any -ος / -η / -ο adjective

Because the comparative is itself an adjective, it runs through the full paradigm you already know, agreeing with its noun in gender, number and case. There is nothing new to learn — ψηλότερος declines exactly like όμορφος:

Case	Masculine	Feminine	Neuter
Nom. sg.	ψηλότερος	ψηλότερη	ψηλότερο
Gen. sg.	ψηλότερου	ψηλότερης	ψηλότερου
Acc. sg.	ψηλότερο	ψηλότερη	ψηλότερο
Nom. pl.	ψηλότεροι	ψηλότερες	ψηλότερα
Acc. pl.	ψηλότερους	ψηλότερες	ψηλότερα

Ζητάμε έναν πιο έμπειρο και ικανότερο συνεργάτη.

zitáme énan pio émbiro ke ikanótero sinergháti

We're looking for a more experienced and more capable partner.

Ανήκει στη νεότερη γενιά των Ελλήνων συγγραφέων.

aníki sti neóteri yeniá ton Elínon singraféon

She belongs to the younger generation of Greek writers.

Η γνώμη ενός εμπειρότερου γιατρού πάντα μετράει.

i ghnómi enós embiróteru yatrú pánda metrái

The opinion of a more experienced doctor always counts.

-τερος or πιο? When to reach for which

The two comparatives are genuinely interchangeable in meaning — ψηλότερος = πιο ψηλός, down to the last nuance. The choice is one of register and rhythm:

The synthetic -τερος form is the natural choice in writing and in the set, high-frequency adjectives where it has become idiomatic (καλύτερος, μεγαλύτερος, μικρότερος, νεότερος). It sounds crisp and a bit more formal.
The analytic πιο form is the safe, spoken default, and it is strongly preferred for long or unfamiliar adjectives, where a synthetic form would be a mouthful — you will hear πιο ενδιαφέρον far more than the technically-possible synthetic version.

Το μετρό είναι σαφώς γρηγορότερο από το λεωφορείο τέτοια ώρα.

to metró íne safós ghrighorótero apó to leoforío tétia óra

The metro is clearly faster than the bus at this time of day.

💡

The tie-breaker in speech is length. Short, common adjectives wear the synthetic suffix comfortably (ψηλότερος, μικρότερος, καλύτερος). But once an adjective gets long — ενδιαφέρων, δημοφιλής, πολυάσχολος — Greeks overwhelmingly switch to πιο: πιο δημοφιλής, not the clumsy synthetic alternative. When in doubt, πιο is never wrong.

💡

The same suffix builds the comparative adverb. Beside the adjective ψηλότερος sits the adverb ψηλότερα ("higher"), and beside γρήγορος → γρηγορότερος you get γρηγορότερα ("faster") — the neuter-plural comparative doing adverb duty. As always, the analytic πιο γρήγορα means exactly the same and is the safe spoken choice; the full picture is on comparing adverbs.

The unbreakable rule: never both

Because -τερος and πιο each already mean "more," using them together is a double comparative — as wrong in Greek as more taller is in English. Pick one road to the meaning:

Χρειαζόμαστε μια απλούστερη λύση, όχι πιο περίπλοκη.

chriazómaste mia aplústeri lísi, óchi pio períploki

We need a simpler solution, not a more complicated one.

Here απλούστερη (synthetic, "simpler") sits happily beside πιο περίπλοκη (analytic, "more complicated") — each adjective uses one comparative, and the sentence is perfect. What you must never write is ×πιο απλούστερη.

A note on the irregular handful

A small group of the commonest adjectives don't build their comparative from -ότερος at all — they are irregular, and reaching for the "regular" suffix is a beginner's mistake. καλός does not give ×καλότερος but καλύτερος; μεγάλος gives μεγαλύτερος, μικρός gives μικρότερος, κακός gives χειρότερος. Because these are the highest-frequency adjectives in the language, they are worth memorising as a block on the irregular comparatives page.

Common Mistakes

1. Combining πιο with a -τερος form. One comparative marker per adjective — never both.

❌ Ο Γιώργος είναι πιο ψηλότερος από τον Νίκο.

Incorrect — use ψηλότερος or πιο ψηλός, never both together.

✅ Ο Γιώργος είναι ψηλότερος από τον Νίκο.

o Yórghos íne psilóteros apó ton Níko

Giorgos is taller than Nikos.

2. Leaving the comparative in the masculine when the noun is feminine or neuter. It is an adjective — it must agree.

❌ Αγόρασα μια φθηνότερο βαλίτσα.

Incorrect — the comparative must agree with βαλίτσα: feminine φθηνότερη.

✅ Αγόρασα μια φθηνότερη βαλίτσα από την προηγούμενη.

aghórasa mia fthinóteri valítsa apó tin proighúmeni

I bought a cheaper suitcase than the last one.

3. Using -ύτερος on a regular -ος adjective. The default suffix is -ότερος; -ύτερος belongs to the -ύς adjectives (and a few irregulars).

❌ Αυτό το δωμάτιο είναι φωτεινύτερο.

Incorrect — a regular -ος adjective takes -ότερος: φωτεινότερο.

✅ Αυτό το δωμάτιο είναι φωτεινότερο από το διπλανό.

aftó to dhomátio íne fotinótero apó to dhiplanó

This room is brighter than the one next door.

4. Regularizing an irregular adjective. καλός, μεγάλος, μικρός and κακός do not take -ότερος.

❌ Η σημερινή ταινία ήταν καλότερη.

Incorrect — καλός is irregular: the comparative is καλύτερη, not ×καλότερη.

✅ Η σημερινή ταινία ήταν καλύτερη από τη χθεσινή.

i simeriní tenía ítan kalíteri apó ti chthesiní

Today's film was better than yesterday's.

Key Takeaways

The synthetic comparative is stem + -ότερος (ψηλότερος, ακριβότερος); adjectives in -ύς take -ύτερος (βαθύτερος).
It declines like an ordinary -ος/-η/-ο adjective and agrees with its noun — it is a full adjective, not a frozen word.
The accent is forced onto the suffix (-ό- or -ύ-) every time, which makes the form easy to spell.
-τερος = πιο in meaning; -τερος reads as tidier and rules in writing and short set adjectives, while πιο wins for long or rare adjectives.
Never combine them (×πιο ψηλότερος), and never regularize the irregulars (×καλότερος → καλύτερος).

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