rasping vs grating

rasping and grating both are nouns.

Word	Noun	Adjective	Verb	Adverb
rasping	Yes	Yes	No	No
grating	Yes	Yes	No	No

As adjectives, rasping and grating are synonyms defined as:

Other synonyms of rasping include gravelly, raspy, rough, scratchy.

rasping (noun)	grating (noun)
uttering in an irritated tone	a barrier that has parallel or crossed bars blocking a passage but admitting air
	a frame of iron bars to hold a fire
	optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum

rasping (adjective)	grating (adjective)
unpleasantly harsh or grating in sound	unpleasantly harsh or grating in sound