Which to use
“mammal” is a noun and “mammary” is an adjective - they look or sound alike but fill different roles in a sentence.
- #19,386
- “mammal” frequency rank
- #45,505
- “mammary” frequency rank
- 64891
- confusion score
Side-by-Side Comparison
| Feature | mammal | mammary |
|---|---|---|
| Definition | An animal of the class Mammalia. | Of or relating to the mamma or breast (of a woman or a female animal). |
Where the eye mixes mammal and mammary
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. mammal runs 6 letters (CVCCVC) against mammary's 7 (CVCCVCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses mammal with mammary
These two trip readers on the page rather than in the ear: mammal is /ˈmæməl/ while mammary is /ˈmæməɹi/. 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 64891, derived from the frequency rank of both members and their visual similarity.
mammal is recorded at frequency rank #19,386, classified as anoun, pronounced /ˈmæməl/. mammary is at rank #45,505, tagged as anadj, pronounced /ˈmæməɹi/.
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 64891, this pair ranks #75,435 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of mammal vs mammary
Shared letters: am. Private to "mammal": l. Private to "mammary": ry.
"mammal" · 6 letters · shape CVCCVC · "mammary" · 7 letters · shape CVCCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "mammal" and "mammary" mean the same thing in a sentence?
Which is more common, "mammal" or "mammary"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "mammal" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "mammary" - compare definitions side by side with the headword page. Word entry
- This pair ranks #75,435 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "mammal" and "mammary" also get mixed up with nearby pairs, the highest-scored neighbour is "mammary vs mammy". 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 #75,435 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.