megestrol acetate vs progestin

megestrol acetate and progestin both are nouns.

Word	Noun	Adjective	Verb	Adverb
megestrol acetate	Yes	No	No	No
progestin	Yes	No	No	No

As nouns, progestin is a hypernym of megestrol acetate; that is, progestin is a word with a broader meaning than megestrol acetate:

megestrol acetate: a synthetic progestational compound used to treat endometrial carcinoma
progestin: any of a group of steroid hormones that have the effect of progesterone

Other hypernyms of megestrol acetate include progestogen.

megestrol acetate (noun)	progestin (noun)
a synthetic progestational compound used to treat endometrial carcinoma	any of a group of steroid hormones that have the effect of progesterone