hole vs bolt-hole

hole and bolt-hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
hole	Yes	No	Yes	No
bolt-hole	Yes	No	No	No

As nouns, bolt-hole is a hyponym of hole; that is, bolt-hole is a word with a more specific, narrower meaning than hole:

hole: an opening into or through something
bolt-hole: a hole through which an animal may bolt when pursued into its burrow or den

Other hyponyms of hole include aperture, bullet hole, cranny, leak, ozone hole, perforation, rathole, knothole, fuckhole.

hole (noun)	bolt-hole (noun)
an opening deliberately made in or through something	a hole through which an animal may bolt when pursued into its burrow or den
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

hole (verb)	bolt-hole (verb)
make holes in
hit the ball into the hole