oral contraceptive pill vs anovulatory drug

oral contraceptive pill and anovulatory drug both are nouns.

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

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

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

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

oral contraceptive pill (noun)	anovulatory drug (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