megestrol vs progestogen

megestrol and progestogen both are nouns.

Word	Noun	Adjective	Verb	Adverb
megestrol	Yes	No	No	No
progestogen	Yes	No	No	No

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

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

Other hypernyms of megestrol include progestin.

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