tit vs mammary gland

tit and mammary gland both are nouns.

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

As nouns, mammary gland is a hypernym of tit; that is, mammary gland is a word with a broader meaning than tit:

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

Other hypernyms of tit include mamma.

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