Which to use
“fess” is a verb and “FISA” is a name - they look or sound alike but fill different roles in a sentence.
- #43,640
- “fess” frequency rank
- #32,399
- “FISA” frequency rank
- 76039
- confusion score
Side-by-Side Comparison
| Feature | fess | FISA |
|---|---|---|
| Definition | To confess; to admit. | Acronym of Foreign Intelligence Surveillance Act. |
Letter map: fess vs FISA
Shared letters muted; letters that set fess and FISA apart highlighted. Shared run: 2. fess (CVCC) and FISA (CVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Role in the sentence - fess and FISA
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fess is averb and FISAaname. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 76039, derived from the frequency rank of both members and their visual similarity.
fess is recorded at frequency rank #43,640, classified as averb, pronounced /fɛs/. FISA is at rank #32,399, tagged as aname.
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 76039, this pair ranks #31,248 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of fess vs FISA
Shared letters: fs. Private to "fess": e. Private to "FISA": ai.
"fess" · 4 letters · shape CVCC · "FISA" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fess" for "FISA" ever safe?
Which is more common, "fess" or "FISA"?
Useful next steps
Pair "fess" vs "FISA" is on the table, pick a follow-up below.
- Full dictionary entry for "fess" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FISA" - compare definitions side by side with the headword page. Word entry
- This pair ranks #31,248 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fess" and "FISA" also get mixed up with nearby pairs, the highest-scored neighbour is "Fenn vs fess". 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 #31,248 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.