Which to use
“son” is a noun and “sto” is a num - they look or sound alike but fill different roles in a sentence.
- #40
- “son” frequency rank
- #36,304
- “sto” frequency rank
- 36344
- confusion score
Side-by-Side Comparison
| Feature | son | sto |
|---|---|---|
| Definition | Sonido rítmico. | Ciento. |
Where the eye mixes son and sto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses son with sto
These two trip readers on the page rather than in the ear: son is [ˈsõn] while sto is [ˈsto]. 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 (noun vs num), which is usually the fastest check. Our composite confusion score for this pair is 36344, derived from the frequency rank of both members and their visual similarity.
son is recorded at frequency rank #40, classified as anoun, pronounced [ˈsõn]. 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 36344, this pair ranks #181,118 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of son vs sto
Shared letters: os. Private to "son": n. Private to "sto": t.
"son" · 3 letters · shape CVC · "sto" · 3 letters · shape CCV
Frequently Asked Questions
Can "son" and "sto" be used interchangeably?
Frequency check: "son" vs "sto" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "son" 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 #181,118 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "son" and "sto" also get mixed up with nearby pairs, the highest-scored neighbour is "stem vs sto". Nearby pair
Confusion rank #181,118 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.