grime vs muck

grime and muck both are nouns.

Word	Noun	Adjective	Verb	Adverb
grime	Yes	No	Yes	No
muck	Yes	No	Yes	No

As verbs, muck is a hyponym of grime; that is, muck is a word with a more specific, narrower meaning than grime:

Other hyponyms of grime include foul, contaminate, foul, pollute, smear, slime, muddy, muddy up, splash, mire, muck up, mud, crock, blemish, spot.

grime (noun)	muck (noun)
anything regarded as making something unclean	any thick, viscous matter
	fecal matter of animals

grime (verb)	muck (verb)
make soiled, filthy, or dirty	remove muck, clear away muck, as in a mine
	soil with mud, muck, or mire
	spread manure, as for fertilization