possess vs possessor

possess is not a noun while possessor is a noun.

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

possess (noun)	possessor (noun)
	a person who owns something

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