antifertility vs prophylactic

antifertility is not a noun while prophylactic is a noun.

Word	Noun	Adjective	Verb	Adverb
antifertility	No	Yes	No	No
prophylactic	Yes	Yes	No	No

As adjectives, antifertility and prophylactic are synonyms defined as:

antifertility and prophylactic: capable of preventing conception or impregnation

Other synonyms of antifertility include contraceptive.

antifertility (noun)	prophylactic (noun)
	contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
	remedy that prevents or slows the course of an illness or disease

antifertility (adjective)	prophylactic (adjective)
capable of preventing conception or impregnation	preventing or contributing to the prevention of disease
	warding off
	capable of preventing conception or impregnation