prophylactic device vs birth control device

prophylactic device and birth control device both are nouns.

Word	Noun	Adjective	Verb	Adverb
prophylactic device	Yes	No	No	No
birth control device	Yes	No	No	No

As nouns, prophylactic device and birth control device are synonyms defined as:

prophylactic device and birth control device: an agent or device intended to prevent conception

Other synonyms of prophylactic device include contraceptive, contraceptive device, preventative, preventive.

prophylactic device (noun)	birth control device (noun)
an agent or device intended to prevent conception	an agent or device intended to prevent conception