Which to use
“FCO” is a name and “fey” is an adjective - they look or sound alike but fill different roles in a sentence.
- #49,916
- “FCO” frequency rank
- #29,654
- “fey” frequency rank
- 79570
- confusion score
Side-by-Side Comparison
| Feature | FCO | fey |
|---|---|---|
| Definition | Initialism of Foreign and Commonwealth Office. | About to die; doomed; on the verge of sudden or violent death. |
Letter map: FCO vs fey
Shared letters muted; letters that set FCO and fey apart highlighted. Shared run: 1. FCO (CCV) and fey (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Role in the sentence - FCO and fey
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: FCO is aname and feyanadjective. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 79570, derived from the frequency rank of both members and their visual similarity.
FCO is recorded at frequency rank #49,916, classified as aname. fey is at rank #29,654, tagged as anadj, pronounced /feɪ/.
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 79570, this pair ranks #21,760 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of FCO vs fey
Shared letters: f. Private to "FCO": co. Private to "fey": ey.
"FCO" · 3 letters · shape CCV · "fey" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "FCO" for "fey" ever safe?
In ordinary English text, does "FCO" or "fey" show up more?
What to do next
Pair "FCO" vs "fey" is on the table, pick a follow-up below.
- Full dictionary entry for "FCO" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fey" - compare definitions side by side with the headword page. Word entry
- This pair ranks #21,760 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "FCO" and "fey" also get mixed up with nearby pairs, the highest-scored neighbour is "FCO vs FOMO". Nearby pair
Confusion rank #21,760 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.