contraceptive pill vs birth control pill

contraceptive pill and birth control pill both are nouns.

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

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

contraceptive pill 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 contraceptive pill include anovulant, anovulatory drug, oral contraceptive, oral contraceptive pill, pill.

contraceptive pill (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