Which to use
“efficace” and “efficaces” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,914
- “efficace” frequency rank
- #5,975
- “efficaces” frequency rank
- 7889
- confusion score
Side-by-Side Comparison
| Feature | efficace | efficaces |
|---|---|---|
| Definition | Qui produit son effet. | Pluriel de efficace. |
Same sound, different letters: efficace vs efficaces
Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 8 letters.
Same sound, different spelling - efficace / efficaces
This is the hard kind. efficace and efficaces are pronounced identically (\e.fi.kas\) and both work as anadjective. Neither the ear nor the grammar will rescue you; only the meaning does, so the glosses below are the whole decision. They differ by 1 extra letter(s) - “efficace” sits inside “efficaces”. Our composite confusion score for this pair is 7889, derived from the frequency rank of both members and their visual similarity.
efficace is recorded at frequency rank #1,914, classified as anadj, pronounced \e.fi.kas\. efficaces is at rank #5,975, tagged as anadj, pronounced \e.fi.kas\.
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 7889, this pair ranks #421,817 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of efficace vs efficaces
Shared letters: acefi. Private to "efficace": -. Private to "efficaces": s.
"efficace" · 8 letters · shape VCCVCVCV · "efficaces" · 9 letters · shape VCCVCVCVC
Known mistypes of this pair
Frequently Asked Questions
Do "efficace" and "efficaces" mean the same thing in a sentence?
In ordinary French text, does "efficace" or "efficaces" show up more?
What to do next
Sound matches; spelling doesn't. Use the exits below to lock the right form or check a cousin pair.
- Full dictionary entry for "efficace" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "efficaces" - compare definitions side by side with the headword page. Word entry
- This pair ranks #421,817 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "efficace" and "efficaces" also get mixed up with nearby pairs, the highest-scored neighbour is "efface vs efficace". 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 #421,817 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.