Which to use
“slough” and “slug” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #26,965
- “slough” frequency rank
- #19,465
- “slug” frequency rank
- 46430
- confusion score
Side-by-Side Comparison
| Feature | slough | slug |
|---|---|---|
| Definition | The skin shed by a snake or other reptile. | Any of many gastropod mollusks, having no (or only a rudimentary) shell. |
Where the eye mixes slough and slug
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. slough runs 6 letters (CCVVCC) against slug's 4 (CCVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between slough and slug
A purely visual mix-up. slough (/slʌf/) and slug (/slʌɡ/) 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 2 letter(s) in length. Our composite confusion score for this pair is 46430, derived from the frequency rank of both members and their visual similarity.
slough is recorded at frequency rank #26,965, classified as anoun, pronounced /slʌf/. slug is at rank #19,465, tagged as anoun, pronounced /slʌɡ/.
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 46430, this pair ranks #211,799 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of slough vs slug
Shared letters: glsu. Private to "slough": ho. Private to "slug": -.
"slough" · 6 letters · shape CCVVCC · "slug" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "slough" and "slug" be used interchangeably?
Frequency check: "slough" vs "slug" - which ranks higher?
Useful next steps
Eye-level mix-up between "slough" and "slug" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "slough" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "slug" - compare definitions side by side with the headword page. Word entry
- This pair ranks #211,799 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "slough" and "slug" 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 #211,799 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.