healthful vs prophylactic

healthful is not a noun while prophylactic is a noun.

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

healthful (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

healthful (adjective)	prophylactic (adjective)
conducive to good health of body or mind	preventing or contributing to the prevention of disease
free from filth and pathogens	warding off
	capable of preventing conception or impregnation