Which to use
“UA” and “UAS” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #20,251
- “UA” frequency rank
- #49,687
- “UAS” frequency rank
- 69938
- confusion score
Side-by-Side Comparison
| Feature | UA | UAS |
|---|---|---|
| Definition | Initialism of unauthorized absence. | Initialism of uncrewed aerial system, unmanned aerial system, uncrewed aircraft system, or unmanned aircraft system: an aircraft with no onboard pilot, and sometimes completely unpiloted, as well as the other components of the system, including automated guidance and telemetry, a remote operator if any, etc. |
Letter map: UA vs UAS
Shared letters muted; letters that set UA and UAS apart highlighted. Shared run: 2.
Spelling & dictionary notes on UA vs UAS
UA and UAS are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 extra letter(s) - “UA” sits inside “UAS”. Our composite confusion score for this pair is 69938, derived from the frequency rank of both members and their visual similarity.
UA is recorded at frequency rank #20,251, classified as anoun. UAS is at rank #49,687, 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 69938, this pair ranks #52,545 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of UA vs UAS
Shared letters: au. Private to "UA": -. Private to "UAS": s.
"UA" · 2 letters · shape VV · "UAS" · 3 letters · shape VVC
Frequently Asked Questions
Is swapping "UA" for "UAS" ever safe?
In ordinary English text, does "UA" or "UAS" show up more?
Useful next steps
You've compared "UA" and "UAS". Here's where to go from here.
- Full dictionary entry for "UA" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "UAS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #52,545 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "UA" and "UAS" also get mixed up with nearby pairs, the highest-scored neighbour is "UAS vs UHD". Nearby pair
Confusion rank #52,545 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.