afterimage vs aftersensation

afterimage and aftersensation both are nouns.

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

As nouns, afterimage and aftersensation are synonyms defined as:

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

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