obi vs oz, What's the Difference?

Which to use

“obi” and “oz” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#18,379
“obi” frequency rank: #7,037
“oz” frequency rank: 25416
confusion score

Side-by-Side Comparison

Feature	obi	oz
Definition	A sash worn with a kimono.	Abbreviation of ounce; any of various units of weight and volume.

Where the eye mixes obi and oz

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

3 ch

obi

2 ch

Look-alike desk: obi vs oz

A purely visual mix-up. obi (/ˈoʊbi/) and oz (/aʊns/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 25416, derived from the frequency rank of both members and their visual similarity.

obi is recorded at frequency rank #18,379, classified as anoun, pronounced /ˈoʊbi/. oz is at rank #7,037, tagged as anoun, pronounced /aʊns/.

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 25416, this pair ranks #394,445 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of obi vs oz

Shared letters: o. Private to "obi": bi. Private to "oz": z.

"obi" · 3 letters · shape VCV · "oz" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "obi" for "oz" ever safe?

No. They are said differently (/ˈoʊbi/ versus /aʊns/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "obi" or "oz"?

"oz" is the more common of the two: it sits at frequency rank #7,037 in our English list, against #18,379 for "obi". 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 "obi" and "oz" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "obi" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "oz" - compare definitions side by side with the headword page. Word entry
This pair ranks #394,445 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"obi" and "oz" also get mixed up with nearby pairs, the highest-scored neighbour is "obi vs omi". Nearby pair

Confusion rank #394,445 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.