oral contraceptive vs birth control pill

oral contraceptive and birth control pill both are nouns.

Word	Noun	Adjective	Verb	Adverb
oral contraceptive	Yes	No	No	No
birth control pill	Yes	No	No	No

As nouns, oral contraceptive and birth control pill are synonyms defined as:

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

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

oral contraceptive (noun)	birth control 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