Which to use
“sum” is a noun and “sup” is a verb - they look or sound alike but fill different roles in a sentence.
- #4,050
- “sum” frequency rank
- #13,818
- “sup” frequency rank
- 17868
- confusion score
Side-by-Side Comparison
| Feature | sum | sup |
|---|---|---|
| Definition | A quantity obtained by addition or aggregation. | To sip; to take a small amount of food or drink into the mouth, especially with a spoon. |
Where the spellings diverge
Shared letters are muted; the letters that actually set sum and sup apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
sum and sup form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by a single letter - m in “sum” becomes p in “sup” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 17868, derived from the frequency rank of both members and their visual similarity.
sum is recorded at frequency rank #4,050, classified as anoun, pronounced /sʌm/. 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 17868, this pair ranks #448,608 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "sum" and "sup" be used interchangeably?
Remembering sum vs sup
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “sum”; for a verb, it's “sup”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “sum” entry
- Browse more pairs most likely to be confused. Most confusable