anovulatory drug vs oral contraceptive

anovulatory drug and oral contraceptive both are nouns.

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

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

anovulatory drug and oral contraceptive: 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, pill.

anovulatory drug (noun)	oral contraceptive (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