ob vs OK, What's the Difference?

Which to use

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

#16,547
“ob” frequency rank: #750
“OK” frequency rank: 17297
confusion score

Side-by-Side Comparison

Feature	ob	OK
Definition	a halfpenny	Endorsement; approval; acceptance; acquiescence.

Where the eye mixes ob and OK

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

2 ch

Spelling & Dictionary Insight

A purely visual mix-up. ob (/ɒb/) and OK (/ˌəʊˈkeɪ/) 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 a single letter - b in “ob” becomes k in “OK”. Our composite confusion score for this pair is 17297, derived from the frequency rank of both members and their visual similarity.

ob is recorded at frequency rank #16,547, classified as anoun, pronounced /ɒb/. OK is at rank #750, tagged as anoun, pronounced /ˌəʊˈkeɪ/.

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 17297, this pair ranks #452,354 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ob vs OK

Shared letters: o. Private to "ob": b. Private to "OK": k.

"ob" · 2 letters · shape VC · "OK" · 2 letters · shape VC

Frequently Asked Questions

Can "ob" and "OK" be used interchangeably?

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

Which is more common, "ob" or "OK"?

"OK" is the more common of the two: it sits at frequency rank #750 in our English list, against #16,547 for "ob". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

You've compared "ob" and "OK". Here's where to go from here.

Full dictionary entry for "ob" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "OK" - compare definitions side by side with the headword page. Word entry
This pair ranks #452,354 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ob" and "OK" also get mixed up with nearby pairs, the highest-scored neighbour is "ob vs omi". Nearby pair

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.