Which to use
“spleen” is a noun and “sullen” is an adjective - they look or sound alike but fill different roles in a sentence.
- #24,321
- “spleen” frequency rank
- #41,399
- “sullen” frequency rank
- 65720
- confusion score
Side-by-Side Comparison
| Feature | spleen | sullen |
|---|---|---|
| Definition | In vertebrates, including humans, a ductless vascular gland, located in the left upper abdomen near the stomach, which destroys old red blood cells, removes debris from the bloodstream, acts as a reservoir of blood, and produces lymphocytes. | Having a brooding ill temper; sulky. |
Where the spellings diverge
Shared letters are muted; the letters that actually set spleen and sullen apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: spleen is /spliːn/ while sullen is /ˈsʌlən/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 65720, derived from the frequency rank of both members and their visual similarity.
spleen is recorded at frequency rank #24,321, classified as anoun, pronounced /spliːn/. sullen is at rank #41,399, tagged as anadj, pronounced /ˈsʌlən/.
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 65720, this pair ranks #71,403 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of spleen vs sullen
Shared letters: elns. Private to "spleen": p. Private to "sullen": u.
"spleen" · 6 letters · shape CCCVVC · "sullen" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "spleen" and "sullen" be used interchangeably?
Which is more common, "spleen" or "sullen"?
Remembering spleen vs sullen
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “spleen”; for an adjective, it's “sullen”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “spleen” entry
- Browse more pairs most likely to be confused. Most confusable