protective vs preventive

protective is not a noun while preventive is a noun.

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

protective (noun)	preventive (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

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