Which to use
“effect” is a noun and “effectif” is an adjective - they look or sound alike but fill different roles in a sentence.
- #20,129
- “effect” frequency rank
- #4,327
- “effectif” frequency rank
- 24456
- confusion score
Side-by-Side Comparison
| Feature | effect | effectif |
|---|---|---|
| Definition | Résultat, suite, aboutissement. | Qui produit un effet réel. |
Where the eye mixes effect and effectif
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence.
Why the eye confuses effect with effectif
These two trip readers on the page rather than in the ear: effect is \ɪ.ˈfɛkt\ while effectif is \e.fɛk.tif\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “effect” sits inside “effectif”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 24456, derived from the frequency rank of both members and their visual similarity.
effect is recorded at frequency rank #20,129, classified as anoun, pronounced \ɪ.ˈfɛkt\. effectif is at rank #4,327, tagged as anadj, pronounced \e.fɛk.tif\.
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 24456, this pair ranks #346,539 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of effect vs effectif
Shared letters: ceft. Private to "effect": -. Private to "effectif": i.
"effect" · 6 letters · shape VCCVCC · "effectif" · 8 letters · shape VCCVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "effect" for "effectif" ever safe?
In ordinary French text, does "effect" or "effectif" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "effect" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "effectif" - compare definitions side by side with the headword page. Word entry
- This pair ranks #346,539 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "effect" and "effectif" also get mixed up with nearby pairs, the highest-scored neighbour is "effect vs effectua". 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 #346,539 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.