fail vs muck up

fail and muck up both are verbs.

Word	Noun	Adjective	Verb	Adverb
fail	No	No	Yes	No
muck up	No	No	Yes	No

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

fail (verb)	muck up (verb)
stop operating or functioning	soil with mud, muck, or mire
deteriorate	make a mess of, destroy or ruin
prove insufficient
disappoint, prove undependable to; abandon, forsake
become bankrupt or insolvent; fail financially and close
be unsuccessful
fail to get a passing grade
fail to do something; leave something undone
judge unacceptable
be unable
fall short in what is expected