Which to use
“STI” is a noun and “sup” is a verb - they look or sound alike but fill different roles in a sentence.
- #26,266
- “STI” frequency rank
- #13,818
- “sup” frequency rank
- 40084
- confusion score
Side-by-Side Comparison
| Feature | STI | sup |
|---|---|---|
| Definition | Initialism of sexually transmitted infection (also S.T.I.). | To sip; to take a small amount of food or drink into the mouth, especially with a spoon. |
Letter map: STI vs sup
Shared letters muted; letters that set STI and sup apart highlighted. Shared run: 1.
Part-of-speech tell for STI / sup
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: STI is anoun and supaverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 40084, derived from the frequency rank of both members and their visual similarity.
STI is recorded at frequency rank #26,266, classified as anoun. sup is at rank #13,818, tagged as averb, pronounced /sʌp/.
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 40084, this pair ranks #270,826 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of STI vs sup
Shared letters: s. Private to "STI": it. Private to "sup": pu.
"STI" · 3 letters · shape CCV · "sup" · 3 letters · shape CVC
Frequently Asked Questions
Can "STI" and "sup" be used interchangeably?
In ordinary English text, does "STI" or "sup" show up more?
What to do next
Pair "STI" vs "sup" is on the table, pick a follow-up below.
- Full dictionary entry for "STI" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sup" - compare definitions side by side with the headword page. Word entry
- This pair ranks #270,826 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "STI" and "sup" also get mixed up with nearby pairs, the highest-scored neighbour is "Sif vs STI". Nearby pair
Confusion rank #270,826 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.