saltiness vs taste perception

saltiness and taste perception both are nouns.

Word	Noun	Adjective	Verb	Adverb
saltiness	Yes	No	No	No
taste perception	Yes	No	No	No

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

saltiness: the taste experience when common salt is taken into the mouth
taste perception: the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus

Other hypernyms of saltiness include gustatory perception, gustatory sensation, taste, taste sensation.

saltiness (noun)	taste perception (noun)
the property of containing salt (as a compound or in solution)	the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus
the taste experience when common salt is taken into the mouth
language or humor that is down-to-earth