TSA vs Tsui, What's the Difference?

Which to use

“TSA” and “Tsui” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#18,720
“TSA” frequency rank: #46,827
“Tsui” frequency rank: 65547
confusion score

Side-by-Side Comparison

Feature	TSA	Tsui
Definition	Initialism of Transportation Security Administration.	A surname.

Letter map: TSA vs Tsui

Shared letters muted; letters that set TSA and Tsui apart highlighted. Shared run: 2.

3 ch

TSA

4 ch

Tsui

Spelling & dictionary notes on TSA vs Tsui

TSA and Tsui 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 letter(s) in length. Our composite confusion score for this pair is 65547, derived from the frequency rank of both members and their visual similarity.

TSA is recorded at frequency rank #18,720, classified as aname. Tsui is at rank #46,827, tagged as aname.

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 65547, this pair ranks #72,211 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of TSA vs Tsui

Shared letters: st. Private to "TSA": a. Private to "Tsui": iu.

"TSA" · 3 letters · shape CCV · "Tsui" · 4 letters · shape CCVV

Known mistypes of this pair

Tsui ← stui · tsiu · tssui · ttsui · tusi

Frequently Asked Questions

Is swapping "TSA" for "Tsui" ever safe?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "TSA" or "Tsui"?

"TSA" is the more common of the two: it sits at frequency rank #18,720 in our English list, against #46,827 for "Tsui". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "TSA" and "Tsui". Here's where to go from here.

Full dictionary entry for "TSA" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Tsui" - compare definitions side by side with the headword page. Word entry
This pair ranks #72,211 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"TSA" and "Tsui" also get mixed up with nearby pairs, the highest-scored neighbour is "TDI vs Tsui". 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 #72,211 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.