eyehole vs peephole

eyehole and peephole both are nouns.

Word	Noun	Adjective	Verb	Adverb
eyehole	Yes	No	No	No
peephole	Yes	No	No	No

As nouns, eyehole and peephole are synonyms defined as:

eyehole and peephole: a hole (in a door or an oven etc) through which you can peep

Other synonyms of eyehole include spyhole.

eyehole (noun)	peephole (noun)
a small hole (usually round and finished around the edges) in cloth or leather for the passage of a cord or hook or bar	a hole (in a door or an oven etc) through which you can peep
a hole (in a door or an oven etc) through which you can peep