Which to use
“sleeper” is a noun and “sleepy” is an adjective - they look or sound alike but fill different roles in a sentence.
- #15,911
- “sleeper” frequency rank
- #11,608
- “sleepy” frequency rank
- 27519
- confusion score
Side-by-Side Comparison
| Feature | sleeper | sleepy |
|---|---|---|
| Definition | Someone who sleeps. | Tired; feeling the need for sleep. |
Where the eye mixes sleeper and sleepy
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Look-alike desk: sleeper vs sleepy
These two trip readers on the page rather than in the ear: sleeper is /ˈsliːpə(ɹ)/ while sleepy is /ˈsliːpi/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 27519, derived from the frequency rank of both members and their visual similarity.
sleeper is recorded at frequency rank #15,911, classified as anoun, pronounced /ˈsliːpə(ɹ)/. sleepy is at rank #11,608, tagged as anadj, pronounced /ˈsliːpi/.
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 27519, this pair ranks #378,298 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sleeper vs sleepy
Shared letters: elps. Private to "sleeper": r. Private to "sleepy": y.
"sleeper" · 7 letters · shape CCVVCVC · "sleepy" · 6 letters · shape CCVVCV
Known mistypes of this pair
Frequently Asked Questions
Do "sleeper" and "sleepy" mean the same thing in a sentence?
Which is more common, "sleeper" or "sleepy"?
What to do next
Eye-level mix-up between "sleeper" and "sleepy" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "sleeper" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sleepy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #378,298 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sleeper" and "sleepy" also get mixed up with nearby pairs, the highest-scored neighbour is "sleepy vs sweety". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #378,298 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.