choke off vs obstruct

choke off and obstruct both are verbs.

Word	Noun	Adjective	Verb	Adverb
choke off	No	No	Yes	No
obstruct	No	No	Yes	No

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

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

choke off (verb)	obstruct (verb)
suppress	block passage through
become or cause to become obstructed	shut out from view or get in the way so as to hide from sight
	hinder or prevent the progress or accomplishment of