Which to use
“fis” is a verb and “fo” is an intj - they look or sound alike but fill different roles in a sentence.
- #37,094
- “fis” frequency rank
- #20,044
- “fo” frequency rank
- 57138
- confusion score
Side-by-Side Comparison
| Feature | fis | fo |
|---|---|---|
| Definition | Primera persona del singular (je) del pretérito perfecto simple de indicativo de faire. | Expresión usada al percibir mal olor o sabor. |
Where the eye mixes fis and fo
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between fis and fo
These two trip readers on the page rather than in the ear: fis is [fi] while fo is [ˈfo]. 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 (verb vs intj), which is usually the fastest check. Our composite confusion score for this pair is 57138, derived from the frequency rank of both members and their visual similarity.
fis is recorded at frequency rank #37,094, classified as averb, pronounced [fi]. fo is at rank #20,044, tagged as anintj, pronounced [ˈfo].
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 57138, this pair ranks #71,690 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of fis vs fo
Shared letters: f. Private to "fis": is. Private to "fo": o.
"fis" · 3 letters · shape CVC · "fo" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "fis" for "fo" ever safe?
Which is more common, "fis" or "fo"?
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 "fis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #71,690 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "fis" and "fo" also get mixed up with nearby pairs, the highest-scored neighbour is "filos vs fis". Nearby pair
Confusion rank #71,690 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.