mamma vs tit

mamma and tit both are nouns.

Word	Noun	Adjective	Verb	Adverb
mamma	Yes	No	No	No
tit	Yes	No	No	No

As nouns, tit is a hyponym of mamma; that is, tit is a word with a more specific, narrower meaning than mamma:

mamma: milk-secreting organ of female mammals
tit: either of two soft fleshy milk-secreting glandular organs on the chest of a woman

Other hyponyms of mamma include dug, bag, udder, boob, bosom, breast, knocker, titty.

mamma (noun)	tit (noun)
milk-secreting organ of female mammals	small insectivorous birds
informal terms for a mother	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
	the small projection of a mammary gland