openmouthed vs popeyed

openmouthed and popeyed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
openmouthed	No	Yes	No	No
popeyed	No	Yes	No	No

As adjectives, openmouthed and popeyed are synonyms defined as:

Other synonyms of openmouthed include goggle-eyed.

openmouthed (adjective)	popeyed (adjective)
with eyes or mouth open in surprise	having bulging eyes
	with eyes or mouth open in surprise