Which to use
“ob” is a pronoun and “omo” is a noun - they look or sound alike but fill different roles in a sentence.
- #28,692
- “ob” frequency rank
- #40,711
- “omo” frequency rank
- 69403
- confusion score
Side-by-Side Comparison
| Feature | ob | omo |
|---|---|---|
| Definition | eu, pronome pessoal do caso nominativo da primeira pessoa do singular; | ohm, unidade de medida de resistência elétrica no Sistema Internacional de Unidades (SI) |
Where the eye mixes ob and omo
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. ob runs 2 letters (VC) against omo's 3 (VCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses ob with omo
These two trip readers on the page rather than in the ear: ob is /ob/ while omo is /ˈo.mo/, /ˈɔ.mɔ/. 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 (pronoun vs noun), which is usually the fastest check. Our composite confusion score for this pair is 69403, derived from the frequency rank of both members and their visual similarity.
ob is recorded at frequency rank #28,692, classified as apron, pronounced /ob/. omo is at rank #40,711, tagged as anoun, pronounced /ˈo.mo/, /ˈɔ.mɔ/.
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 69403, this pair ranks #3,957 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of ob vs omo
Shared letters: o. Private to "ob": b. Private to "omo": m.
"ob" · 2 letters · shape VC · "omo" · 3 letters · shape VCV
Frequently Asked Questions
Can "ob" and "omo" be used interchangeably?
Frequency check: "ob" vs "omo" - which ranks higher?
After this comparison
Eye-level mix-up between "ob" and "omo" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "ob" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "omo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #3,957 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "ob" and "omo" also get mixed up with nearby pairs, the highest-scored neighbour is "omo vs oni". Nearby pair
Confusion rank #3,957 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.