slime vs muck

slime and muck both are nouns.

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

As nouns, slime and muck are synonyms defined as:

Other synonyms of slime include goo, gook, goop, guck, gunk, ooze, sludge.

slime (noun)	muck (noun)
any thick, viscous matter	any thick, viscous matter
	fecal matter of animals

slime (verb)	muck (verb)
cover or stain with slime	remove muck, clear away muck, as in a mine
	soil with mud, muck, or mire
	spread manure, as for fertilization