perceptual vs perception

perceptual is not a noun while perception is a noun.

Word	Noun	Adjective	Verb	Adverb
perceptual	No	Yes	No	No
perception	Yes	No	No	No

perceptual (noun)	perception (noun)
	becoming aware of something via the senses
	the process of perceiving
	the representation of what is perceived; basic component in the formation of a concept
	a way of conceiving something
	knowledge gained by perceiving

perceptual (adjective)	perception (adjective)
of or relating to the act of perceiving