Which to use
“sloth” and “slough” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #25,579
- “sloth” frequency rank
- #26,965
- “slough” frequency rank
- 52544
- confusion score
Side-by-Side Comparison
| Feature | sloth | slough |
|---|---|---|
| Definition | Laziness; slowness in the mindset; disinclination to action or labour. | The skin shed by a snake or other reptile. |
Where the eye mixes sloth and slough
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. sloth runs 5 letters (CCVCC) against slough's 6 (CCVVCC) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: sloth vs slough
A purely visual mix-up. sloth (/sləʊθ/) and slough (/slʌf/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 52544, 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/. slough is at rank #26,965, tagged as anoun, pronounced /slʌf/.
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 52544, this pair ranks #156,146 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sloth vs slough
Shared letters: hlos. Private to "sloth": t. Private to "slough": gu.
"sloth" · 5 letters · shape CCVCC · "slough" · 6 letters · shape CCVVCC
Known mistypes of this pair
Frequently Asked Questions
Can "sloth" and "slough" be used interchangeably?
Frequency check: "sloth" vs "slough" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sloth" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "slough" - compare definitions side by side with the headword page. Word entry
- This pair ranks #156,146 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sloth" and "slough" also get mixed up with nearby pairs, the highest-scored neighbour is "sleuth vs slough". 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 #156,146 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.