choke off vs close up

choke off and close up both are verbs.

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

As verbs, close up is a hypernym of choke off; that is, close up is a word with a broader meaning than choke off:

Other hypernyms of choke off include block, impede, jam, obstruct, obturate, occlude.

choke off (verb)	close up (verb)
suppress	refuse to talk or stop talking; fall silent
become or cause to become obstructed	block passage through
	unite or bring into contact or bring together the edges of
	cease to operate or cause to cease operating

choke off (adverb)	close up (adverb)
	very close