Which to use
“STM” is a noun and “sup” is a verb - they look or sound alike but fill different roles in a sentence.
- #38,181
- “STM” frequency rank
- #13,818
- “sup” frequency rank
- 51999
- confusion score
Side-by-Side Comparison
| Feature | STM | sup |
|---|---|---|
| Definition | Initialism of scanning tunneling microscope. | To sip; to take a small amount of food or drink into the mouth, especially with a spoon. |
Letter map: STM vs sup
Shared letters muted; letters that set STM and sup apart highlighted. Shared run: 1.
Grammar separator: STM vs sup
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: STM 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 51999, derived from the frequency rank of both members and their visual similarity.
STM is recorded at frequency rank #38,181, 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 51999, this pair ranks #160,694 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of STM vs sup
Shared letters: s. Private to "STM": mt. Private to "sup": pu.
"STM" · 3 letters · shape CCC · "sup" · 3 letters · shape CVC
Frequently Asked Questions
Do "STM" and "sup" mean the same thing in a sentence?
Which is more common, "STM" or "sup"?
After this comparison
Pair "STM" vs "sup" is on the table, pick a follow-up below.
- Full dictionary entry for "STM" 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 #160,694 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "STM" and "sup" also get mixed up with nearby pairs, the highest-scored neighbour is "Sif vs STM". Nearby pair
Confusion rank #160,694 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.