squinch vs trumpet arch

squinch and trumpet arch both are nouns.

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

As nouns, trumpet arch is a hyponym of squinch; that is, trumpet arch is a word with a more specific, narrower meaning than squinch:

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

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

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