trumpet arch vs squinch

trumpet arch and squinch both are nouns.

Word	Noun	Adjective	Verb	Adverb
trumpet arch	Yes	No	No	No
squinch	Yes	No	Yes	No

As nouns, squinch is a hypernym of trumpet arch; that is, squinch is a word with a broader meaning than trumpet arch:

trumpet arch: a conical squinch
squinch: a small arch built across the interior angle of two walls (usually to support a spire)

trumpet arch (noun)	squinch (noun)
a conical squinch	a small arch built across the interior angle of two walls (usually to support a spire)

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