aftertaste vs aftersensation

aftertaste and aftersensation both are nouns.

Word	Noun	Adjective	Verb	Adverb
aftertaste	Yes	No	No	No
aftersensation	Yes	No	No	No

As nouns, aftersensation is a hypernym of aftertaste; that is, aftersensation is a word with a broader meaning than aftertaste:

aftertaste: an afterimage of a taste
aftersensation: an image (usually a negative image) that persists after stimulation has ceased

Other hypernyms of aftertaste include afterimage.

aftertaste (noun)	aftersensation (noun)
an afterimage of a taste	an image (usually a negative image) that persists after stimulation has ceased