box vs but, What's the Difference?

Which to use

“box” is a noun and “but” is a preposition - they look or sound alike but fill different roles in a sentence.

#962
“box” frequency rank: #25
“but” frequency rank: 987
confusion score

Side-by-Side Comparison

Feature	box	but
Definition	Senses relating to a three-dimensional object or space.	Apart from, except (for), excluding.

Where the eye mixes box and but

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

3 ch

box

3 ch

but

Why the eye confuses box with but

These two trip readers on the page rather than in the ear: box is /bɒks/ while but is /ˈbʌt/. 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 (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 987, derived from the frequency rank of both members and their visual similarity.

box is recorded at frequency rank #962, classified as anoun, pronounced /bɒks/. but is at rank #25, tagged as aprep, pronounced /ˈbʌt/.

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 987, this pair ranks #528,365 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of box vs but

Shared letters: b. Private to "box": ox. Private to "but": tu.

"box" · 3 letters · shape CVC · "but" · 3 letters · shape CVC

Frequently Asked Questions

Can "box" and "but" be used interchangeably?

No - they are not even the same part of speech. "box" is a noun and "but" a preposition, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "box" or "but"?

"but" is the more common of the two: it sits at frequency rank #25 in our English list, against #962 for "box". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "box" and "but" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "box" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "but" - compare definitions side by side with the headword page. Word entry
This pair ranks #528,365 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"box" and "but" also get mixed up with nearby pairs, the highest-scored neighbour is "BFS vs box". Nearby pair

Confusion rank #528,365 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.