Which to use
“FCO” is a name and “FES” is a noun - they look or sound alike but fill different roles in a sentence.
- #49,916
- “FCO” frequency rank
- #39,812
- “FES” frequency rank
- 89728
- confusion score
Side-by-Side Comparison
| Feature | FCO | FES |
|---|---|---|
| Definition | Initialism of Foreign and Commonwealth Office. | Initialism of floppy eyelid syndrome |
Letter map: FCO vs FES
Shared letters muted; letters that set FCO and FES apart highlighted. Shared run: 1. FCO (CCV) and FES (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Role in the sentence - FCO and FES
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: FCO is aname and FESanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 89728, derived from the frequency rank of both members and their visual similarity.
FCO is recorded at frequency rank #49,916, classified as aname. FES is at rank #39,812, tagged as anoun.
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 89728, this pair ranks #4,870 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of FCO vs FES
Shared letters: f. Private to "FCO": co. Private to "FES": es.
"FCO" · 3 letters · shape CCV · "FES" · 3 letters · shape CVC
Frequently Asked Questions
Is swapping "FCO" for "FES" ever safe?
In ordinary English text, does "FCO" or "FES" show up more?
Useful next steps
You've compared "FCO" and "FES". Here's where to go from here.
- Full dictionary entry for "FCO" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FES" - compare definitions side by side with the headword page. Word entry
- This pair ranks #4,870 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "FCO" and "FES" also get mixed up with nearby pairs, the highest-scored neighbour is "FCO vs FOMO". Nearby pair
Confusion rank #4,870 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.