mamma vs boob

mamma and boob both are nouns.

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

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

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

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

mamma (noun)	boob (noun)
milk-secreting organ of female mammals	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
informal terms for a mother	an ignorant or foolish person

mamma (verb)	boob (verb)
	commit a faux pas or a fault or make a serious mistake