Which to use
“so” is an adverb and “sto” is a num - they look or sound alike but fill different roles in a sentence.
- #3,151
- “so” frequency rank
- #36,304
- “sto” frequency rank
- 39455
- confusion score
Side-by-Side Comparison
| Feature | so | sto |
|---|---|---|
| Definition | Intensifica las cualidades, normalmente negativas, del sustantivo o adjetivo al que modifica. | Ciento. |
Where the eye mixes so and sto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses so with sto
These two trip readers on the page rather than in the ear: so is [so] while sto is [ˈsto]. 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 (adverb vs num), which is usually the fastest check. Our composite confusion score for this pair is 39455, derived from the frequency rank of both members and their visual similarity.
so is recorded at frequency rank #3,151, classified as anadv, pronounced [so]. sto is at rank #36,304, tagged as anum, pronounced [ˈsto].
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 39455, this pair ranks #164,388 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of so vs sto
Shared letters: os. Private to "so": -. Private to "sto": t.
"so" · 2 letters · shape CV · "sto" · 3 letters · shape CCV
Frequently Asked Questions
Do "so" and "sto" mean the same thing in a sentence?
Frequency check: "so" vs "sto" - which ranks higher?
After this comparison
Eye-level mix-up between "so" and "sto" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "so" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sto" - compare definitions side by side with the headword page. Word entry
- This pair ranks #164,388 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "so" and "sto" also get mixed up with nearby pairs, the highest-scored neighbour is "stem vs sto". Nearby pair
Confusion rank #164,388 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.