ob vs oír, What's the Difference?

Which to use

“ob” is a conjunction and “oír” is a verb - they look or sound alike but fill different roles in a sentence.

#30,601
“ob” frequency rank: #3,866
“oír” frequency rank: 34467
confusion score

Side-by-Side Comparison

Feature	ob	oír
Definition	Si.	Percibir sonidos con el oído.

Where the eye mixes ob and oír

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

2 ch

3 ch

oír

Look-alike desk: ob vs oír

These two trip readers on the page rather than in the ear: ob is [ɔp] while oír is [oˈiɾ]. 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 (conjunction vs verb), which is usually the fastest check. Our composite confusion score for this pair is 34467, derived from the frequency rank of both members and their visual similarity.

ob is recorded at frequency rank #30,601, classified as aconj, pronounced [ɔp]. oír is at rank #3,866, tagged as averb, pronounced [oˈiɾ].

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 34467, this pair ranks #191,287 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ob vs oír

Shared letters: o. Private to "ob": b. Private to "oír": rí.

"ob" · 2 letters · shape VC · "oír" · 3 letters · shape VVC

Frequently Asked Questions

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

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

Which is more common, "ob" or "oír"?

"oír" is the more common of the two: it sits at frequency rank #3,866 in our Spanish list, against #30,601 for "ob". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "ob" and "oír" 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 "oír" - compare definitions side by side with the headword page. Word entry
This pair ranks #191,287 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"ob" and "oír" also get mixed up with nearby pairs, the highest-scored neighbour is "ob vs ome". Nearby pair

Confusion rank #191,287 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.