mote vs grinding

mote and grinding both are nouns.

Word	Noun	Adjective	Verb	Adverb
mote	Yes	No	No	No
grinding	Yes	No	No	No

As nouns, grinding is a hyponym of mote; that is, grinding is a word with a more specific, narrower meaning than mote:

Other hyponyms of mote include grain, chylomicron, flyspeck, identification particle.

mote (noun)	grinding (noun)
(nontechnical usage) a tiny piece of anything	a harsh and strident sound (as of the grinding of gears)
	material resulting from the process of grinding
	the wearing down of rock particles by friction due to water or wind or ice