muck about vs putter

muck about is not a noun while putter is a noun.

Word	Noun	Adjective	Verb	Adverb
muck about	No	No	Yes	No
putter	Yes	No	Yes	No

As verbs, muck about and putter are synonyms defined as:

muck about and putter: do random, unplanned work or activities or spend time idly

Other synonyms of muck about include mess around, monkey, monkey around, muck around, potter, tinker.

muck about (noun)	putter (noun)
	the iron normally used on the putting green
	a golfer who is putting

muck about (verb)	putter (verb)
do random, unplanned work or activities or spend time idly	move around aimlessly
	do random, unplanned work or activities or spend time idly
	work lightly