sonarvssonnerWhat's the difference?

Quick tell: sonar is a noun, sonner is a verb, so they fill different roles in a sentence.

Which to use

“sonar” is a noun and “sonner” is a verb - they look or sound alike but fill different roles in a sentence.

#36,596
“sonar” frequency rank
#10,075
“sonner” frequency rank
46671
confusion score

Side-by-Side Comparison

Feature sonar sonner
Definition Appareil utilisant les propriétés particulières de la propagation du son dans l’eau pour détecter et situer les objets sous l’eau par écholocation. Rendre un son.

Where the eye mixes sonar and sonner

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

5 ch
sonar
6 ch
sonner

Visual trap between sonar and sonner

These two trip readers on the page rather than in the ear: sonar is \sɔ.naʁ\ while sonner is \sɔ.ne\. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 46671, derived from the frequency rank of both members and their visual similarity.

sonar is recorded at frequency rank #36,596, classified as anoun, pronounced \sɔ.naʁ\. sonner is at rank #10,075, tagged as averb, pronounced \sɔ.ne\.

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 46671, this pair ranks #193,078 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sonar vs sonner

Shared letters: nors. Private to "sonar": a. Private to "sonner": e.

"sonar" · 5 letters · shape CVCVC  ·  "sonner" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • sonarosnar · snoar · soanr · sonarr · sonnar · sonra · ssonar
  • sonnerosnner · snoner · sonenr · soner · sonnerr · sonnre · ssonner

Frequently Asked Questions

Do "sonar" and "sonner" mean the same thing in a sentence?
No - they are not even the same part of speech. "sonar" is a noun and "sonner" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "sonar" or "sonner" show up more?
"sonner" is the more common of the two: it sits at frequency rank #10,075 in our French list, against #36,596 for "sonar". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "sonar" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sonner" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #193,078 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "sonar" and "sonner" also get mixed up with nearby pairs, the highest-scored neighbour is "Sénart vs sonar". 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 #193,078 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