Which to use
“sludge” is a noun and “smudged” is an adjective - they look or sound alike but fill different roles in a sentence.
- #21,661
- “sludge” frequency rank
- #49,053
- “smudged” frequency rank
- 70714
- confusion score
Side-by-Side Comparison
| Feature | sludge | smudged |
|---|---|---|
| Definition | Solids separated from suspension in a liquid. | Blurred as by being rubbed. |
Letter map: sludge vs smudged
Shared letters muted; letters that set sludge and smudged apart highlighted. Shared run: 5. sludge runs 6 letters (CCVCCV) against smudged's 7 (CCVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - sludge and smudged
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sludge is anoun and smudgedanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 70714, derived from the frequency rank of both members and their visual similarity.
sludge is recorded at frequency rank #21,661, classified as anoun, pronounced /slʌd͡ʒ/. smudged is at rank #49,053, tagged as anadj.
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 70714, this pair ranks #49,425 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of sludge vs smudged
Shared letters: degsu. Private to "sludge": l. Private to "smudged": m.
"sludge" · 6 letters · shape CCVCCV · "smudged" · 7 letters · shape CCVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "sludge" for "smudged" ever safe?
In ordinary English text, does "sludge" or "smudged" show up more?
Useful next steps
Pair "sludge" vs "smudged" is on the table, pick a follow-up below.
- Full dictionary entry for "sludge" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "smudged" - compare definitions side by side with the headword page. Word entry
- This pair ranks #49,425 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sludge" and "smudged" also get mixed up with nearby pairs, the highest-scored neighbour is "smudge vs smudged". 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 #49,425 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.