possessive vs possess

possessive is a noun but possess is not a noun.

Word	Noun	Adjective	Verb	Adverb
possessive	Yes	Yes	No	No
possess	No	No	Yes	No

possessive (noun)	possess (noun)
the case expressing ownership

possessive (adjective)	possess (adjective)
serving to express or indicate possession
desirous of owning
having or showing a desire to control or dominate

possessive (verb)	possess (verb)
	have ownership or possession of
	have as an attribute, knowledge, or skill
	enter into and control, as of emotions or ideas