prolongentvsprolongésConfusable pair

Quick tell: prolongent is a verb, prolongés is an adjective, so they fill different roles in a sentence.

Which to use

“prolongent” is a verb and “prolongés” is an adjective - they look or sound alike but fill different roles in a sentence.

#33,842
“prolongent” frequency rank
#37,494
“prolongés” frequency rank
71336
confusion score

Side-by-Side Comparison

Feature prolongent prolongés
Definition Troisième personne du pluriel du présent de l’indicatif de prolonger. Masculin pluriel de prolongé.

Where the eye mixes prolongent and prolongés

Muted = shared; highlighted = the visual trap. They share 7 letters in sequence. prolongent runs 10 letters (CCVCVCCVCC) against prolongés's 9 (CCVCVCCVC) - the length gap alone is often enough to separate them once you know to check it.

10 ch
prolongent
9 ch
prolongés

Visual trap between prolongent and prolongés

These two trip readers on the page rather than in the ear: prolongent is \pʁɔ.lɔ̃ʒ\ while prolongés is \pʁɔ.lɔ̃.ʒe\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 71336, derived from the frequency rank of both members and their visual similarity.

prolongent is recorded at frequency rank #33,842, classified as averb, pronounced \pʁɔ.lɔ̃ʒ\. prolongés is at rank #37,494, tagged as anadj, pronounced \pʁɔ.lɔ̃.ʒe\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 71336, this pair ranks #47,900 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of prolongent vs prolongés

Shared letters: glnopr. Private to "prolongent": et. Private to "prolongés": sé.

"prolongent" · 10 letters · shape CCVCVCCVCC  ·  "prolongés" · 9 letters · shape CCVCVCCVC

Known mistypes of this pair

  • prolongent ← porlongent · pprolongent · prloongent · prollongent · prolnogent · prolognent · prolonegnt · prolongennt

Frequently Asked Questions

Can "prolongent" and "prolongés" be used interchangeably?
No - they are not even the same part of speech. "prolongent" is a verb and "prolongés" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "prolongent" or "prolongés" show up more?
"prolongent" is the more common of the two: it sits at frequency rank #33,842 in our French list, against #37,494 for "prolongés". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "prolongent" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "prolongés" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #47,900 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "prolongent" and "prolongés" also get mixed up with nearby pairs, the highest-scored neighbour is "prolongera vs prolongés". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #47,900 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list