anovulatory drug vs contraceptive pill

anovulatory drug and contraceptive pill both are nouns.

Word	Noun	Adjective	Verb	Adverb
anovulatory drug	Yes	No	No	No
contraceptive pill	Yes	No	No	No

As nouns, anovulatory drug and contraceptive pill are synonyms defined as:

anovulatory drug and contraceptive pill: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception

Other synonyms of anovulatory drug include anovulant, birth control pill, oral contraceptive, oral contraceptive pill, pill.

anovulatory drug (noun)	contraceptive pill (noun)
a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception	a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception