pull a face vs screw up

pull a face and screw up both are verbs.

Word	Noun	Adjective	Verb	Adverb
pull a face	No	No	Yes	No
screw up	No	No	Yes	No

As verbs, screw up is a hyponym of pull a face; that is, screw up is a word with a more specific, narrower meaning than pull a face:

pull a face: contort the face to indicate a certain mental or emotional state
screw up: twist into a strained configuration

Other hyponyms of pull a face include squinch, squint, wince, smile, frown, glower, lour, lower, mop, mow, pout.

pull a face (verb)	screw up (verb)
contort the face to indicate a certain mental or emotional state	twist into a strained configuration
	make more intense
	screw or turn higher
	make a mess of, destroy or ruin