Which to use
“flex” is an adjective and “flyer” is a verb - they look or sound alike but fill different roles in a sentence.
- #31,032
- “flex” frequency rank
- #42,882
- “flyer” frequency rank
- 73914
- confusion score
Side-by-Side Comparison
| Feature | flex | flyer |
|---|---|---|
| Definition | Qui fait preuve de flexibilité. | Déguerpir, partir rapidement. |
Where the eye mixes flex and flyer
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses flex with flyer
These two trip readers on the page rather than in the ear: flex is \fleks\ while flyer is \fla.je\. 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 (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 73914, derived from the frequency rank of both members and their visual similarity.
flex is recorded at frequency rank #31,032, classified as anadj, pronounced \fleks\. flyer is at rank #42,882, tagged as averb, pronounced \fla.je\.
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 73914, this pair ranks #38,887 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of flex vs flyer
Shared letters: efl. Private to "flex": x. Private to "flyer": ry.
"flex" · 4 letters · shape CCVC · "flyer" · 5 letters · shape CCVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "flex" for "flyer" ever safe?
Which is more common, "flex" or "flyer"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "flex" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "flyer" - compare definitions side by side with the headword page. Word entry
- This pair ranks #38,887 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "flex" and "flyer" also get mixed up with nearby pairs, the highest-scored neighbour is "flour vs flyer". 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 #38,887 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.