flinch vs squinch

flinch and squinch both are nouns.

Word	Noun	Adjective	Verb	Adverb
flinch	Yes	No	Yes	No
squinch	Yes	No	Yes	No

As verbs, flinch and squinch are synonyms defined as:

Other synonyms of flinch include cringe, funk, quail, recoil, shrink, wince.

flinch (noun)	squinch (noun)
a reflex response to sudden pain	a small arch built across the interior angle of two walls (usually to support a spire)

flinch (verb)	squinch (verb)
draw back, as with fear or pain	cross one's eyes as if in strabismus
	draw back, as with fear or pain
	crouch down