tie up vs knit

tie up is not a noun while knit is a noun.

Word	Noun	Adjective	Verb	Adverb
tie up	No	No	Yes	No
knit	Yes	No	Yes	No

tie up (noun)	knit (noun)
	needlework created by interlacing yarn in a series of connected loops using straight eyeless needles or by machine
	a basic knitting stitch made by putting the needle through the front of the stitch from the lefthand side
	a fabric made by knitting

tie up (verb)	knit (verb)
secure with or as if with ropes	to gather something into small wrinkles or folds
finish the last row	make (textiles) by knitting
restrain from moving or operating normally	tie or link together
secure in or as if in a berth or dock
invest so as to make unavailable for other purposes