Which to use
“a1” is an adjective and “as” is an adverb - they look or sound alike but fill different roles in a sentence.
- #12,173
- “a1” frequency rank
- #18
- “as” frequency rank
- 12191
- confusion score
Side-by-Side Comparison
| Feature | a1 | as |
|---|---|---|
| Definition | first rate or excellent | To such an extent or degree; to the same extent or degree. |
Letter map: a1 vs as
Shared letters muted; letters that set a1 and as apart highlighted. Shared run: 1.
Part-of-speech tell for a1 / as
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: a1 is anadjective and asanadverb. On the page they differ by a single letter - 1 in “a1” becomes s in “as”. Our composite confusion score for this pair is 12191, derived from the frequency rank of both members and their visual similarity.
a1 is recorded at frequency rank #12,173, classified as anadj. as is at rank #18, tagged as anadv, pronounced /əz/.
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 12191, this pair ranks #482,937 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of a1 vs as
Shared letters: a. Private to "a1": -. Private to "as": s.
"a1" · 1 letters · shape V · "as" · 2 letters · shape VC
Frequently Asked Questions
Do "a1" and "as" mean the same thing in a sentence?
In ordinary English text, does "a1" or "as" show up more?
After this comparison
Done with this confusable. These links stay specific to "a1" and "as".
- Full dictionary entry for "a1" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "as" - compare definitions side by side with the headword page. Word entry
- This pair ranks #482,937 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "a1" and "as" also get mixed up with nearby pairs, the highest-scored neighbour is "a1 vs amb". Nearby pair
Confusion rank #482,937 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.