als vs AU, What's the Difference?

Which to use

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

#17,755
“als” frequency rank: #6,867
“AU” frequency rank: 24622
confusion score

Side-by-Side Comparison

Feature	als	AU
Definition	Obsolete form of also.	Initialism of alopecia universalis.

Letter map: als vs AU

Shared letters muted; letters that set als and AU apart highlighted. Shared run: 1.

3 ch

als

2 ch

Grammar separator: als vs AU

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: als is anadverb and AUanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 24622, derived from the frequency rank of both members and their visual similarity.

als is recorded at frequency rank #17,755, classified as anadv. AU is at rank #6,867, tagged as anoun.

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 24622, this pair ranks #400,632 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of als vs AU

Shared letters: a. Private to "als": ls. Private to "AU": u.

"als" · 3 letters · shape VCC · "AU" · 2 letters · shape VV

Frequently Asked Questions

Do "als" and "AU" mean the same thing in a sentence?

No - they are not even the same part of speech. "als" is an adverb and "AU" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary English text, does "als" or "AU" show up more?

"AU" is the more common of the two: it sits at frequency rank #6,867 in our English list, against #17,755 for "als". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "als" vs "AU" is on the table, pick a follow-up below.

Full dictionary entry for "als" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "AU" - compare definitions side by side with the headword page. Word entry
This pair ranks #400,632 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"als" and "AU" also get mixed up with nearby pairs, the highest-scored neighbour is "als vs amb". Nearby pair

Confusion rank #400,632 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.