blyvsbunWhich spelling fits?

Which to use

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

#46,343
“bly” frequency rank
#13,674
“bun” frequency rank
60017
confusion score

Side-by-Side Comparison

Feature bly bun
Definition Likeness; resemblance; look aspect; species; character. Senses referring to baked goods.

Where the eye mixes bly and bun

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

3 ch
bly
3 ch
bun

Look-alike desk: bly vs bun

A purely visual mix-up. bly (/blaɪ/) and bun (/bʌn/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 60017, derived from the frequency rank of both members and their visual similarity.

bly is recorded at frequency rank #46,343, classified as anoun, pronounced /blaɪ/. bun is at rank #13,674, tagged as anoun, pronounced /bʌn/.

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 60017, this pair ranks #102,688 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of bly vs bun

Shared letters: b. Private to "bly": ly. Private to "bun": nu.

"bly" · 3 letters · shape CCV  ·  "bun" · 3 letters · shape CVC

Frequently Asked Questions

Can "bly" and "bun" be used interchangeably?
No. They are said differently (/blaɪ/ versus /bʌn/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "bly" or "bun" show up more?
"bun" is the more common of the two: it sits at frequency rank #13,674 in our English list, against #46,343 for "bly". 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 "bly" and "bun" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "bly" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "bun" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #102,688 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "bly" and "bun" also get mixed up with nearby pairs, the highest-scored neighbour is "BFS vs bly". Nearby pair

Confusion rank #102,688 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list