sou vs STA, What's the Difference?

Which to use

“sou” is a noun and “STA” is a name - they look or sound alike but fill different roles in a sentence.

#35,525
“sou” frequency rank: #19,212
“STA” frequency rank: 54737
confusion score

Side-by-Side Comparison

Feature	sou	STA
Definition	An old French copper coin equal to one twentieth of a livre or twelve deniers; one sou is to the livre as one shilling is to the pound.	Initialism of State Transport Authority.

Letter map: sou vs STA

Shared letters muted; letters that set sou and STA apart highlighted. Shared run: 1.

3 ch

sou

3 ch

STA

Grammar separator: sou vs STA

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sou is anoun and STAaname. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 54737, derived from the frequency rank of both members and their visual similarity.

sou is recorded at frequency rank #35,525, classified as anoun, pronounced /suː/. STA is at rank #19,212, 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 54737, this pair ranks #138,814 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sou vs STA

Shared letters: s. Private to "sou": ou. Private to "STA": at.

"sou" · 3 letters · shape CVV · "STA" · 3 letters · shape CCV

Frequently Asked Questions

Can "sou" and "STA" be used interchangeably?

No - they are not even the same part of speech. "sou" is a noun and "STA" a name, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "sou" or "STA"?

"STA" is the more common of the two: it sits at frequency rank #19,212 in our English list, against #35,525 for "sou". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "sou" and "STA".

Full dictionary entry for "sou" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "STA" - compare definitions side by side with the headword page. Word entry
This pair ranks #138,814 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"sou" and "STA" also get mixed up with nearby pairs, the highest-scored neighbour is "Sif vs sou". Nearby pair

Confusion rank #138,814 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.