eauxvsécuWhich spelling fits?

Which to use

“eaux” and “écu” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#1,863
“eaux” frequency rank
#28,025
“écu” frequency rank
29888
confusion score

Side-by-Side Comparison

Feature eaux écu
Definition Pluriel de eau. Bouclier que portaient autrefois les chevaliers.

Where the eye mixes eaux and écu

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. eaux runs 4 letters (VVVC) against écu's 3 (VCV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
eaux
3 ch
écu

Visual trap between eaux and écu

A purely visual mix-up. eaux (\o\) and écu (\e.ky\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 29888, derived from the frequency rank of both members and their visual similarity.

eaux is recorded at frequency rank #1,863, classified as anoun, pronounced \o\. écu is at rank #28,025, tagged as anoun, pronounced \e.ky\.

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 29888, this pair ranks #313,843 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of eaux vs écu

Shared letters: u. Private to "eaux": aex. Private to "écu": cé.

"eaux" · 4 letters · shape VVVC  ·  "écu" · 3 letters · shape VCV

Known mistypes of this pair

  • eaux ← aeux · eauxx · eaxu · euax

Frequently Asked Questions

Is swapping "eaux" for "écu" ever safe?
No. They are said differently (\o\ versus \e.ky\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "eaux" or "écu"?
"eaux" is the more common of the two: it sits at frequency rank #1,863 in our French list, against #28,025 for "écu". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

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

  • Full dictionary entry for "eaux" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "écu" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #313,843 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "eaux" and "écu" also get mixed up with nearby pairs, the highest-scored neighbour is "écu vs EPO". 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 #313,843 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