mammilla vs teat

mammilla and teat both are nouns.

Word	Noun	Adjective	Verb	Adverb
mammilla	Yes	No	No	No
teat	Yes	No	No	No

As nouns, mammilla and teat are synonyms defined as:

Other synonyms of mammilla include mamilla, nipple, pap, tit.

mammilla (noun)	teat (noun)
the small projection of a mammary gland	the small projection of a mammary gland