hang around vs mill about

hang around and mill about both are verbs.

Word	Noun	Adjective	Verb	Adverb
hang around	No	No	Yes	No
mill about	No	No	Yes	No

As verbs, hang around and mill about are synonyms defined as:

hang around and mill about: be about a place without any apparent purpose

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

hang around (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