Which to use
“Ost” is a noun and “otto” is a num - they look or sound alike but fill different roles in a sentence.
- #27,958
- “Ost” frequency rank
- #11,925
- “otto” frequency rank
- 39883
- confusion score
Side-by-Side Comparison
| Feature | Ost | otto |
|---|---|---|
| Definition | leste | oito (8, VIII) |
Where the eye mixes Ost and otto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: Ost vs otto
These two trip readers on the page rather than in the ear: Ost is /ɔst/ while otto is /ˈɔtto/. 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 (noun vs num), which is usually the fastest check. Our composite confusion score for this pair is 39883, derived from the frequency rank of both members and their visual similarity.
Ost is recorded at frequency rank #27,958, classified as anoun, pronounced /ɔst/. otto is at rank #11,925, tagged as anum, pronounced /ˈɔtto/.
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 39883, this pair ranks #26,302 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of Ost vs otto
Shared letters: ot. Private to "Ost": s. Private to "otto": -.
"Ost" · 3 letters · shape VCC · "otto" · 4 letters · shape VCCV
Known mistypes of this pair
- otto ← oto · otot · toto
Frequently Asked Questions
Is swapping "Ost" for "otto" ever safe?
Frequency check: "Ost" vs "otto" - 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 "Ost" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "otto" - compare definitions side by side with the headword page. Word entry
- This pair ranks #26,302 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "Ost" and "otto" also get mixed up with nearby pairs, the highest-scored neighbour is "oni vs Ost". 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 #26,302 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.