choke off vs back up

choke off and back up both are verbs.

Word	Noun	Adjective	Verb	Adverb
choke off	No	No	Yes	No
back up	No	No	Yes	No

As verbs, choke off and back up are synonyms defined as:

Other synonyms of choke off include choke, clog, clog up, congest, crap up, foul.

choke off (verb)	back up (verb)
suppress	establish as valid or genuine
become or cause to become obstructed	become or cause to become obstructed
	make a copy of (a computer file) especially for storage in another place as a security copy
	move backwards from a certain position
	give moral or psychological support, aid, or courage to