sit around vs sit

sit around and sit both are verbs.

Word	Noun	Adjective	Verb	Adverb
sit around	No	No	Yes	No
sit	No	No	Yes	No

As verbs, sit around and sit are synonyms defined as:

sit around (verb)	sit (verb)
be around, often idly or without specific purpose	serve in a specific professional capacity
	be in a position in which one's upper body is largely upright and supported by one's backside
	show to a seat; assign a seat for
	take a seat
	be in session
	sit and travel on the back of animal, usually while controlling its motions
	assume a posture as for artistic purposes
	work or act as a baby-sitter
	be around, often idly or without specific purpose
	be located or situated somewhere