mammary gland vs tit

mammary gland and tit both are nouns.

Word	Noun	Adjective	Verb	Adverb
mammary gland	Yes	No	No	No
tit	Yes	No	No	No

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

mammary gland: 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 mammary gland include dug, bag, udder, boob, bosom, breast, knocker, titty.

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