spyhole vs hole

spyhole and hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
spyhole	Yes	No	No	No
hole	Yes	No	Yes	No

As nouns, hole is a hypernym of spyhole; that is, hole is a word with a broader meaning than spyhole:

spyhole (noun)	hole (noun)
a hole (in a door or an oven etc) through which you can peep	an opening deliberately made in or through something
	one playing period (from tee to green) on a golf course
	informal terms for the mouth
	an opening into or through something
	a depression hollowed out of solid matter
	an unoccupied space
	informal terms for a difficult situation
	a fault

spyhole (verb)	hole (verb)
	make holes in
	hit the ball into the hole