perception vs looking

perception and looking both are nouns.

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

As nouns, looking is a hyponym of perception; that is, looking is a word with a more specific, narrower meaning than perception:

perception: becoming aware of something via the senses
looking: the act of directing the eyes toward something and perceiving it visually; look

Other hyponyms of perception include look, looking at, hearing, listening, lipreading, taste, tasting, smell, smelling.

perception (noun)	looking (noun)
becoming aware of something via the senses	the act of searching visually
the process of perceiving	the act of directing the eyes toward something and perceiving it visually; look
the representation of what is perceived; basic component in the formation of a concept
a way of conceiving something
knowledge gained by perceiving

perception (adjective)	looking (adjective)
	appearing to be as specified; usually used as combining forms