alcvsauxTell them apart

Quick tell: alc is a noun, aux is an adjective, so they fill different roles in a sentence.

Which to use

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

#49,757
“alc” frequency rank
#16,176
“aux” frequency rank
65933
confusion score

Side-by-Side Comparison

Feature alc aux
Definition Abbreviation of alcohol. Abbreviation of auxiliary.

Letter map: alc vs aux

Shared letters muted; letters that set alc and aux apart highlighted. Shared run: 1.

3 ch
alc
3 ch
aux

Role in the sentence - alc and aux

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: alc is anoun and auxanadjective. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 65933, derived from the frequency rank of both members and their visual similarity.

alc is recorded at frequency rank #49,757, classified as anoun. aux is at rank #16,176, tagged as anadj, pronounced /ˈɔks/.

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 65933, this pair ranks #70,380 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of alc vs aux

Shared letters: a. Private to "alc": cl. Private to "aux": ux.

"alc" · 3 letters · shape VCC  ·  "aux" · 3 letters · shape VVC

Frequently Asked Questions

Do "alc" and "aux" mean the same thing in a sentence?
No - they are not even the same part of speech. "alc" is a noun and "aux" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "alc" or "aux"?
"aux" is the more common of the two: it sits at frequency rank #16,176 in our English list, against #49,757 for "alc". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "alc" vs "aux" is on the table, pick a follow-up below.

  • Full dictionary entry for "alc" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aux" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #70,380 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "alc" and "aux" also get mixed up with nearby pairs, the highest-scored neighbour is "alc vs amb". Nearby pair

Confusion rank #70,380 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