spoil vs muck up

spoil is a noun but muck up is not a noun.

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

As verbs, spoil and muck up are synonyms defined as:

spoil (noun)	muck up (noun)
the act of stripping and taking by force
the act of spoiling something by causing damage to it
(usually plural) valuables taken by violence (especially in war)

spoil (verb)	muck up (verb)
become unfit for consumption or use	soil with mud, muck, or mire
alter from the original	make a mess of, destroy or ruin
make imperfect
destroy and strip of its possession
have a strong desire or urge to do something
hinder or prevent (the efforts, plans, or desires) of
treat with excessive indulgence
make a mess of, destroy or ruin