Which to use
“ob” is a conjunction and “om” is a noun - they look or sound alike but fill different roles in a sentence.
- #30,601
- “ob” frequency rank
- #24,976
- “om” frequency rank
- 55577
- confusion score
Side-by-Side Comparison
| Feature | ob | om |
|---|---|---|
| Definition | Si. | Hombre |
Where the eye mixes ob and om
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between ob and om
These two trip readers on the page rather than in the ear: ob is [ɔp] while om is [om]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - b in “ob” becomes m in “om”, and the parts of speech differ too (conjunction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 55577, 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]. om is at rank #24,976, tagged as anoun, pronounced [om].
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 55577, this pair ranks #78,284 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of ob vs om
Shared letters: o. Private to "ob": b. Private to "om": m.
"ob" · 2 letters · shape VC · "om" · 2 letters · shape VC
Frequently Asked Questions
Is swapping "ob" for "om" ever safe?
Which is more common, "ob" or "om"?
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 "om" - compare definitions side by side with the headword page. Word entry
- This pair ranks #78,284 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "ob" and "om" also get mixed up with nearby pairs, the highest-scored neighbour is "ob vs ome". Nearby pair
Confusion rank #78,284 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.