betavsbutWhich spelling fits?

Quick tell: beta is a noun, but is an adverb, so they fill different roles in a sentence.

Which to use

“beta” is a noun and “but” is an adverb - they look or sound alike but fill different roles in a sentence.

#9,076
“beta” frequency rank
#11,178
“but” frequency rank
20254
confusion score

Side-by-Side Comparison

Feature beta but
Definition Segunda letra del alfabeto griego. Muy.

Where the eye mixes beta and but

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
beta
3 ch
but

Look-alike desk: beta vs but

These two trip readers on the page rather than in the ear: beta is [ˈbet̪a] while but is [ˈbut̪]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 20254, derived from the frequency rank of both members and their visual similarity.

beta is recorded at frequency rank #9,076, classified as anoun, pronounced [ˈbet̪a]. but is at rank #11,178, tagged as anadv, pronounced [ˈbut̪].

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 20254, this pair ranks #260,134 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of beta vs but

Shared letters: bt. Private to "beta": ae. Private to "but": u.

"beta" · 4 letters · shape CVCV  ·  "but" · 3 letters · shape CVC

Known mistypes of this pair

  • betabbeta · betta · btea · ebta

Frequently Asked Questions

Is swapping "beta" for "but" ever safe?
No - they are not even the same part of speech. "beta" is a noun and "but" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "beta" or "but"?
"beta" is the more common of the two: it sits at frequency rank #9,076 in our Spanish list, against #11,178 for "but". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "beta" 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 #260,134 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "beta" and "but" also get mixed up with nearby pairs, the highest-scored neighbour is "but vs butt". 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 #260,134 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list