preventive vs protective

preventive is a noun but protective is not a noun.

Word	Noun	Adjective	Verb	Adverb
preventive	Yes	Yes	No	No
protective	No	Yes	No	No

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

preventive (adjective)	protective (adjective)
tending to prevent or hinder	intended or adapted to afford protection of some kind
preventing or contributing to the prevention of disease	showing care
	(usually followed by `of') solicitously caring or mindful