knitwork vs tie up

knitwork is a noun but tie up is not a noun.

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

knitwork (noun)	tie up (noun)
needlework created by interlacing yarn in a series of connected loops using straight eyeless needles or by machine

knitwork (verb)	tie up (verb)
	secure with or as if with ropes
	finish the last row
	restrain from moving or operating normally
	secure in or as if in a berth or dock
	invest so as to make unavailable for other purposes