stifle vs close up

stifle is a noun but close up is not a noun.

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

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

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

stifle (noun)	close up (noun)
joint between the femur and tibia in a quadruped; corresponds to the human knee

stifle (verb)	close up (verb)
suppress or constrain so as to lessen in intensity	refuse to talk or stop talking; fall silent
be asphyxiated; die from lack of oxygen	block passage through
suppress in order to conceal or hide	unite or bring into contact or bring together the edges of
impair the respiration of or obstruct the air passage of	cease to operate or cause to cease operating

stifle (adverb)	close up (adverb)
	very close