défi vs Dex, What's the Difference?

Which to use

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

#3,454
“défi” frequency rank: #43,878
“Dex” frequency rank: 47332
confusion score

Side-by-Side Comparison

Feature	défi	Dex
Definition	Action de défier.	Dieu

Where the eye mixes défi and Dex

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

4 ch

défi

3 ch

Dex

Why the eye confuses défi with Dex

A purely visual mix-up. défi (\de.fi\) and Dex (\'de.us\) 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 47332, derived from the frequency rank of both members and their visual similarity.

défi is recorded at frequency rank #3,454, classified as anoun, pronounced \de.fi\. Dex is at rank #43,878, tagged as anoun, pronounced \'de.us\.

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 47332, this pair ranks #187,789 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of défi vs Dex

Shared letters: d. Private to "défi": fié. Private to "Dex": ex.

"défi" · 4 letters · shape CVCV · "Dex" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "défi" for "Dex" ever safe?

No. They are said differently (\de.fi\ versus \'de.us\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Frequency check: "défi" vs "Dex" - which ranks higher?

"défi" is the more common of the two: it sits at frequency rank #3,454 in our French list, against #43,878 for "Dex". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "défi" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Dex" - compare definitions side by side with the headword page. Word entry
This pair ranks #187,789 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"défi" and "Dex" also get mixed up with nearby pairs, the highest-scored neighbour is "DCI vs Dex". Nearby pair

Confusion rank #187,789 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.