preventative vs birth control device

preventative and birth control device both are nouns.

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

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

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

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

preventative (noun)	birth control device (noun)
remedy that prevents or slows the course of an illness or disease	an agent or device intended to prevent conception
an agent or device intended to prevent conception
any obstruction that impedes or is burdensome

preventative (adjective)	birth control device (adjective)
tending to prevent or hinder
preventing or contributing to the prevention of disease