BLS vs but, What's the Difference?

Which to use

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

#37,829
“BLS” frequency rank: #25
“but” frequency rank: 37854
confusion score

Side-by-Side Comparison

Feature	BLS	but
Definition	Initialism of Bureau of Labor Statistics.	Apart from, except (for), excluding.

Letter map: BLS vs but

Shared letters muted; letters that set BLS and but apart highlighted. Shared run: 1.

3 ch

BLS

3 ch

but

Grammar separator: BLS vs but

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: BLS is aname and butapreposition. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 37854, derived from the frequency rank of both members and their visual similarity.

BLS is recorded at frequency rank #37,829, classified as aname. 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 37854, this pair ranks #290,895 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of BLS vs but

Shared letters: b. Private to "BLS": ls. Private to "but": tu.

"BLS" · 3 letters · shape CCC · "but" · 3 letters · shape CVC

Frequently Asked Questions

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

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

In ordinary English text, does "BLS" or "but" show up more?

"but" is the more common of the two: it sits at frequency rank #25 in our English list, against #37,829 for "BLS". 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 "BLS" and "but". Here's where to go from here.

Full dictionary entry for "BLS" 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 #290,895 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"BLS" and "but" also get mixed up with nearby pairs, the highest-scored neighbour is "BFS vs BLS". Nearby pair

Confusion rank #290,895 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.