mess about vs mill about

mess about and mill about both are verbs.

Word	Noun	Adjective	Verb	Adverb
mess about	No	No	Yes	No
mill about	No	No	Yes	No

As verbs, mess about and mill about are synonyms defined as:

mess about and mill about: be about a place without any apparent purpose

Other synonyms of mess about include footle, hang around, lallygag, linger, loaf, loiter, lollygag, lounge, lurk, mill around, tarry.

mess about (verb)	mill about (verb)
be about a place without any apparent purpose	move about in a confused manner
	be about a place without any apparent purpose