Which to use
“firmar” and “firmo” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #4,008
- “firmar” frequency rank
- #18,547
- “firmo” frequency rank
- 22555
- confusion score
Side-by-Side Comparison
| Feature | firmar | firmo |
|---|---|---|
| Definition | Poner la firma en un escrito. | Primera persona del singular (yo) del presente de indicativo de firmar. |
Where the eye mixes firmar and firmo
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. firmar runs 6 letters (CVCCVC) against firmo's 5 (CVCCV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: firmar vs firmo
A purely visual mix-up. firmar ([fiɾˈmaɾ]) and firmo ([ˈfiɾmo]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 22555, derived from the frequency rank of both members and their visual similarity.
firmar is recorded at frequency rank #4,008, classified as averb, pronounced [fiɾˈmaɾ]. firmo is at rank #18,547, tagged as averb, pronounced [ˈfiɾmo].
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 22555, this pair ranks #249,776 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of firmar vs firmo
Shared letters: fimr. Private to "firmar": a. Private to "firmo": o.
"firmar" · 6 letters · shape CVCCVC · "firmo" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Can "firmar" and "firmo" be used interchangeably?
Frequency check: "firmar" vs "firmo" - which ranks higher?
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 "firmar" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "firmo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #249,776 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "firmar" and "firmo" also get mixed up with nearby pairs, the highest-scored neighbour is "fideo vs firmo". 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 #249,776 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.