clog up vs close up

clog up and close up both are verbs.

Word	Noun	Adjective	Verb	Adverb
clog up	No	No	Yes	No
close up	No	No	Yes	Yes

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

Other hypernyms of clog up include block, impede, jam, obstruct, obturate, occlude.

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

clog up (adverb)	close up (adverb)
	very close