ob vs omo, What's the Difference?

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 spellings diverge

Shared letters are muted; the letters that actually set ob and omo apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

2 ch

3 ch

omo

Spelling & Dictionary Insight

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

Frequency comparison

ob#28,692

omo#40,711

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "ob" and "omo" be used interchangeably?

No - they are not even the same part of speech. "ob" is a pronoun and "omo" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "ob" or "omo"?

"ob" is the more common of the two: it sits at frequency rank #28,692 in our Portuguese list, against #40,711 for "omo". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering ob vs omo

The fastest way to pick the right one every time.

Check the role first: if you need a pronoun, it's “ob”; for a noun, it's “omo”.
See each word in full, definition, IPA, etymology and its other confusables. Full “ob” entry
Browse more pairs most likely to be confused. Most confusable