Which to use
“supo” is a verb and “sure” is an adjective - they look or sound alike but fill different roles in a sentence.
- #4,201
- “supo” frequency rank
- #42,717
- “sure” frequency rank
- 46918
- confusion score
Side-by-Side Comparison
| Feature | supo | sure |
|---|---|---|
| Definition | Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del pretérito perfecto simple de indicativo de saber. | Seguro, convencido. |
Where the eye mixes supo and sure
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses supo with sure
These two trip readers on the page rather than in the ear: supo is [ˈsupo] while sure is /ʃʊə/ (fusión pour–poor). Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 46918, derived from the frequency rank of both members and their visual similarity.
supo is recorded at frequency rank #4,201, classified as averb, pronounced [ˈsupo]. sure is at rank #42,717, tagged as anadj, pronounced /ʃʊə/ (fusión pour–poor).
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 46918, this pair ranks #123,009 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of supo vs sure
Shared letters: su. Private to "supo": op. Private to "sure": er.
"supo" · 4 letters · shape CVCV · "sure" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Do "supo" and "sure" mean the same thing in a sentence?
In ordinary Spanish text, does "supo" or "sure" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "supo" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sure" - compare definitions side by side with the headword page. Word entry
- This pair ranks #123,009 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "supo" and "sure" also get mixed up with nearby pairs, the highest-scored neighbour is "sari vs sure". 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 #123,009 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.