detrition vs wearing away

detrition and wearing away both are nouns.

Word	Noun	Adjective	Verb	Adverb
detrition	Yes	No	No	No
wearing away	Yes	No	No	No

As nouns, wearing away is a hypernym of detrition; that is, wearing away is a word with a broader meaning than detrition:

detrition: erosion by friction
wearing away: (geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

Other hypernyms of detrition include eating away, eroding, erosion, wearing.

detrition (noun)	wearing away (noun)
effort expended in moving one object over another with pressure	(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively
the wearing down of rock particles by friction due to water or wind or ice
erosion by friction