blue vs but, What's the Difference?

Which to use

“blue” is an adjective and “but” is a conjunction - they look or sound alike but fill different roles in a sentence.

#6,034
“blue” frequency rank: #7,254
“but” frequency rank: 13288
confusion score

Side-by-Side Comparison

Feature	blue	but
Definition	azul	mas, porém, todavia

Letter map: blue vs but

Shared letters muted; letters that set blue and but apart highlighted. Shared run: 2.

4 ch

blue

3 ch

but

Grammar separator: blue vs but

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: blue is anadjective and butaconjunction. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 13288, derived from the frequency rank of both members and their visual similarity.

blue is recorded at frequency rank #6,034, classified as anadj, pronounced /blu:/. but is at rank #7,254, tagged as aconj.

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 13288, this pair ranks #59,113 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of blue vs but

Shared letters: bu. Private to "blue": el. Private to "but": t.

"blue" · 4 letters · shape CCVV · "but" · 3 letters · shape CVC

Known mistypes of this pair

blue ← bblue · bllue · lbue

Frequently Asked Questions

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

No - they are not even the same part of speech. "blue" is an adjective and "but" a conjunction, so a sentence built for one is usually ungrammatical with the other.

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

"blue" is the more common of the two: it sits at frequency rank #6,034 in our Portuguese list, against #7,254 for "but". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "blue" and "but". Here's where to go from here.

Full dictionary entry for "blue" 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 #59,113 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"blue" and "but" also get mixed up with nearby pairs, the highest-scored neighbour is "bué vs but". Nearby pair
Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #59,113 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.