fossilize vs fossil

fossilize is not a noun while fossil is a noun.

Word	Noun	Adjective	Verb	Adverb
fossilize	No	No	Yes	No
fossil	Yes	Yes	No	No

fossilize (noun)	fossil (noun)
	the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
	someone whose style is out of fashion

fossilize (adjective)	fossil (adjective)
	characteristic of a fossil

fossilize (verb)	fossil (verb)
convert to a fossil
become mentally inflexible