Which to use
“FES” and “fleas” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #39,812
- “FES” frequency rank
- #25,061
- “fleas” frequency rank
- 64873
- confusion score
Side-by-Side Comparison
| Feature | FES | fleas |
|---|---|---|
| Definition | Initialism of floppy eyelid syndrome | plural of flea |
Letter map: FES vs fleas
Shared letters muted; letters that set FES and fleas apart highlighted. Shared run: 3. FES runs 3 letters (CVC) against fleas's 5 (CCVVC) - the length gap alone is often enough to separate them once you know to check it.
Pair insight - FES / fleas
FES and fleas are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 64873, derived from the frequency rank of both members and their visual similarity.
FES is recorded at frequency rank #39,812, classified as anoun. fleas is at rank #25,061, tagged as anoun, pronounced /ˈfliːz/.
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 64873, this pair ranks #75,529 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of FES vs fleas
Shared letters: efs. Private to "FES": -. Private to "fleas": al.
"FES" · 3 letters · shape CVC · "fleas" · 5 letters · shape CCVVC
Known mistypes of this pair
- fleas ← felas · ffleas · flaes · fleass · flesa · flleas · lfeas
Frequently Asked Questions
Is swapping "FES" for "fleas" ever safe?
Which is more common, "FES" or "fleas"?
What to do next
Done with this confusable. These links stay specific to "FES" and "fleas".
- Full dictionary entry for "FES" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fleas" - compare definitions side by side with the headword page. Word entry
- This pair ranks #75,529 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "FES" and "fleas" also get mixed up with nearby pairs, the highest-scored neighbour is "FES vs foh". 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 #75,529 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.