Which to use
“sloth” is a noun and “smooth” is an adjective - they look or sound alike but fill different roles in a sentence.
- #25,579
- “sloth” frequency rank
- #3,655
- “smooth” frequency rank
- 29234
- confusion score
Side-by-Side Comparison
| Feature | sloth | smooth |
|---|---|---|
| Definition | Laziness; slowness in the mindset; disinclination to action or labour. | Having a texture that lacks friction. Not rough. |
Where the eye mixes sloth and smooth
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Look-alike desk: sloth vs smooth
These two trip readers on the page rather than in the ear: sloth is /sləʊθ/ while smooth is /smuːð/. 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 29234, derived from the frequency rank of both members and their visual similarity.
sloth is recorded at frequency rank #25,579, classified as anoun, pronounced /sləʊθ/. smooth is at rank #3,655, tagged as anadj, pronounced /smuːð/.
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 29234, this pair ranks #364,718 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sloth vs smooth
Shared letters: host. Private to "sloth": l. Private to "smooth": m.
"sloth" · 5 letters · shape CCVCC · "smooth" · 6 letters · shape CCVVCC
Known mistypes of this pair
Frequently Asked Questions
Can "sloth" and "smooth" be used interchangeably?
In ordinary English text, does "sloth" or "smooth" show up more?
What to do next
Eye-level mix-up between "sloth" and "smooth" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "sloth" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "smooth" - compare definitions side by side with the headword page. Word entry
- This pair ranks #364,718 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sloth" and "smooth" also get mixed up with nearby pairs, the highest-scored neighbour is "sleuth vs sloth". 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 #364,718 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.