Which to use
“morbidity” is a noun and “morbidly” is an adverb - they look or sound alike but fill different roles in a sentence.
- #30,888
- “morbidity” frequency rank
- #48,364
- “morbidly” frequency rank
- 79252
- confusion score
Side-by-Side Comparison
| Feature | morbidity | morbidly |
|---|---|---|
| Definition | The quality of being unhealthful or diseased, sometimes including the cause. | In a morbid manner, or to a morbid degree. |
Letter map: morbidity vs morbidly
Shared letters muted; letters that set morbidity and morbidly apart highlighted. Shared run: 7. morbidity runs 9 letters (CVCCVCVCV) against morbidly's 8 (CVCCVCCV) - the length gap alone is often enough to separate them once you know to check it.
Grammar separator: morbidity vs morbidly
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: morbidity is anoun and morbidlyanadverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 79252, derived from the frequency rank of both members and their visual similarity.
morbidity is recorded at frequency rank #30,888, classified as anoun. morbidly is at rank #48,364, tagged as anadv, pronounced /ˈmɔrbɪdli/.
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 79252, this pair ranks #22,544 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of morbidity vs morbidly
Shared letters: bdimory. Private to "morbidity": t. Private to "morbidly": l.
"morbidity" · 9 letters · shape CVCCVCVCV · "morbidly" · 8 letters · shape CVCCVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "morbidity" for "morbidly" ever safe?
Which is more common, "morbidity" or "morbidly"?
Useful next steps
Done with this confusable. These links stay specific to "morbidity" and "morbidly".
- Full dictionary entry for "morbidity" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "morbidly" - compare definitions side by side with the headword page. Word entry
- This pair ranks #22,544 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "morbidity" and "morbidly" also get mixed up with nearby pairs, the highest-scored neighbour is "morbid vs morbidly". 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 #22,544 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.