sense impression vs perception

sense impression and perception both are nouns.

Word	Noun	Adjective	Verb	Adverb
sense impression	Yes	No	No	No
perception	Yes	No	No	No

As nouns, perception is a hypernym of sense impression; that is, perception is a word with a broader meaning than sense impression:

sense impression (noun)	perception (noun)
an unelaborated elementary awareness of stimulation	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