masking vs aesthesis

masking and aesthesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
masking	Yes	No	No	No
aesthesis	Yes	No	No	No

As nouns, aesthesis is a hypernym of masking; that is, aesthesis is a word with a broader meaning than masking:

masking: the blocking of one sensation resulting from the presence of another sensation
aesthesis: an unelaborated elementary awareness of stimulation

Other hypernyms of masking include esthesis, sensation, sense datum, sense experience, sense impression.

masking (noun)	aesthesis (noun)
the act of concealing the existence of something by obstructing the view of it	an unelaborated elementary awareness of stimulation
scenery used to block the audience's view of parts of the stage that should not be seen
the blocking of one sensation resulting from the presence of another sensation