bind off vs tie up

bind off and tie up both are verbs.

Word	Noun	Adjective	Verb	Adverb
bind off	No	No	Yes	No
tie up	No	No	Yes	No

As verbs, bind off and tie up are synonyms defined as:

bind off (verb)	tie up (verb)
finish the last row	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