clomiphene vs fertility drug

clomiphene and fertility drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
clomiphene	Yes	No	No	No
fertility drug	Yes	No	No	No

As nouns, fertility drug is a hypernym of clomiphene; that is, fertility drug is a word with a broader meaning than clomiphene:

clomiphene: a fertility drug (trade name Clomid) that is used to stimulate ovulation and that has been associated with multiple births
fertility drug: a drug used to increase a woman's fertility

clomiphene (noun)	fertility drug (noun)
a fertility drug (trade name Clomid) that is used to stimulate ovulation and that has been associated with multiple births	a drug used to increase a woman's fertility