prepossess vs impress

prepossess is not a noun while impress is a noun.

Word	Noun	Adjective	Verb	Adverb
prepossess	No	No	Yes	No
impress	Yes	No	Yes	No

As verbs, impress is a hypernym of prepossess; that is, impress is a word with a broader meaning than prepossess:

prepossess (noun)	impress (noun)
	the act of coercing someone into government service

prepossess (verb)	impress (verb)
influence (somebody's) opinion in advance	dye (fabric) before it is spun
cause to be preoccupied	produce or try to produce a vivid impression of
make a positive impression (on someone) beforehand	mark or stamp with or as if with pressure
possess beforehand	take (someone) against his will for compulsory service, especially on board a ship
	reproduce by printing
	impress positively
	have an emotional or cognitive impact upon