hole vs thumbhole

hole and thumbhole both are nouns.

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

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

hole (noun)	thumbhole (noun)
an opening deliberately made in or through something	a finger hole made to fit the thumb (as in a bowling ball)
one playing period (from tee to green) on a golf course	the hole in a woodwind that is closed and opened with the thumb
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)	thumbhole (verb)
make holes in
hit the ball into the hole