Appropriate rhyme for flinch

• A small arch built across the interior angle of two walls (usually to support a spire)

Wikipedia Word definitions in Wikipedia
A squinch in architecture is a construction filling in the upper angles of a square room so as to form a base to receive an octagonal or spherical dome . Another solution of this structural problem was provided by the pendentive .

Wiktionary Word definitions in Wiktionary
n. (context architecture English) A structure constructed between two adjacent walls to aid in the transition from a polygonal to a circular structure; as when a dome is constructed on top of a square room. vb. to scrunch up (one's face)

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1840 (transitive), of faces; intransitive use from 1843. Perhaps related to squinch "narrow opening in a building" (c.1600). Also compare squink-eyed (1630s), variant of squint-eyed , so perhaps it is at least partly an altered form of squint . Related: ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Squinch \Squinch\ (skw[i^]nch), n. [Corrupted fr. sconce.] (Arch.) A small arch thrown across the corner of a square room to support a superimposed mass, as where an octagonal spire or drum rests upon a square tower; -- called also sconce , and sconcheon ...

WordNet Word definitions in WordNet
n. a small arch built across the interior angle of two walls (usually to support a spire) v. crouch down draw back, as with fear or pain; "she flinched when they showed the slaughtering of the calf" [syn: flinch , funk , cringe , shrink , wince , recoil ...