anovulatory drug vs oral contraceptive pill

anovulatory drug and oral contraceptive pill both are nouns.

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

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

anovulatory drug and oral 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, contraceptive pill, oral contraceptive, pill.

anovulatory drug (noun)	oral 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