ob vs one, What's the Difference?

Which to use

“ob” is a pronoun and “one” is an adjective - they look or sound alike but fill different roles in a sentence.

#28,692
“ob” frequency rank: #1,219
“one” frequency rank: 29911
confusion score

Side-by-Side Comparison

Feature	ob	one
Definition	eu, pronome pessoal do caso nominativo da primeira pessoa do singular;	único:

Where the eye mixes ob and one

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch

3 ch

one

Why the eye confuses ob with one

These two trip readers on the page rather than in the ear: ob is /ob/ while one is /ˈwɐn/. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 29911, 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/. one is at rank #1,219, tagged as anadj, pronounced /ˈwɐn/.

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 29911, this pair ranks #38,606 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ob vs one

Shared letters: o. Private to "ob": b. Private to "one": en.

"ob" · 2 letters · shape VC · "one" · 3 letters · shape VCV

Frequently Asked Questions

Do "ob" and "one" mean the same thing in a sentence?

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

In ordinary Portuguese text, does "ob" or "one" show up more?

"one" is the more common of the two: it sits at frequency rank #1,219 in our Portuguese list, against #28,692 for "ob". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "ob" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "one" - compare definitions side by side with the headword page. Word entry
This pair ranks #38,606 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"ob" and "one" also get mixed up with nearby pairs, the highest-scored neighbour is "ob vs oni". Nearby pair

Confusion rank #38,606 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.