gaping vs agape

gaping is not a noun while agape is a noun.

Word	Noun	Adjective	Verb	Adverb
gaping	No	Yes	No	No
agape	Yes	Yes	No	No

As adjectives, gaping and agape are synonyms defined as:

gaping (noun)	agape (noun)
	a religious meal shared as a sign of love and fellowship
	selfless love of one person for another without sexual implications (especially love that is spiritual in nature)
	(Christian theology) the love of God or Christ for mankind

gaping (adjective)	agape (adjective)
with the mouth wide open as in wonder or awe	with the mouth wide open as in wonder or awe