Which to use
“obs” is a verb and “osm” is a noun - they look or sound alike but fill different roles in a sentence.
- #13,851
- “obs” frequency rank
- #41,435
- “osm” frequency rank
- 55286
- confusion score
Side-by-Side Comparison
| Feature | obs | osm |
|---|---|---|
| Definition | Deuxième personne du singulier de l’impératif présent de obsen. | Osmium. |
Where the eye mixes obs and osm
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between obs and osm
These two trip readers on the page rather than in the ear: obs is \ɔps\ while osm is \ɔsm̥\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 55286, derived from the frequency rank of both members and their visual similarity.
obs is recorded at frequency rank #13,851, classified as averb, pronounced \ɔps\. osm is at rank #41,435, tagged as anoun, pronounced \ɔsm̥\.
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 55286, this pair ranks #128,418 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of obs vs osm
Shared letters: os. Private to "obs": b. Private to "osm": m.
"obs" · 3 letters · shape VCC · "osm" · 3 letters · shape VCC
Frequently Asked Questions
Can "obs" and "osm" be used interchangeably?
Which is more common, "obs" or "osm"?
Useful next steps
Eye-level mix-up between "obs" and "osm" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "obs" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "osm" - compare definitions side by side with the headword page. Word entry
- This pair ranks #128,418 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "obs" and "osm" also get mixed up with nearby pairs, the highest-scored neighbour is "och vs osm". Nearby pair
Confusion rank #128,418 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.