mud vs muck

mud and muck both are nouns.

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

As verbs, mud and muck are synonyms defined as:

Other synonyms of mud include mire, muck up.

mud (noun)	muck (noun)
slanderous remarks or charges	any thick, viscous matter
water soaked soil; soft wet earth	fecal matter of animals

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