types:
air hole
a hole that allows the passage of air
armhole
a hole through which you put your arm and where a sleeve can be attached
bunghole
a hole in a barrel or cask; used to fill or empty it
countersink
a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface
cup
the hole (or metal container in the hole) on a golf green
ear hole
a hole (as in a helmet) for sound to reach the ears
eye
a small hole or loop (as in a needle)
eyehole,
eyelet
a small hole (usually round and finished around the edges) in cloth or leather for the passage of a cord or hook or bar
finger hole
one of a series of holes in a woodwind instrument; pitch changes when a finger covers it
keyhole
the hole where a key is inserted
loophole
a small hole in a fortified wall; for observation or discharging weapons
lubber's hole
hole in a platform on a mast through which a sailor can climb without going out on the shrouds
manhole
a hole (usually with a flush cover) through which a person can gain access to an underground structure
mortice,
mortise
a square hole made to receive a tenon and so to form a joint
mouth hole
a hole (as in a ski mask) for the mouth
nail hole
a hole left after a nail is removed
perforation
a line of small holes for tearing at a particular place
plughole
a hole into which a plug fits (especially a hole where water drains away)
puncture
a small hole made by a sharp object
sound hole
a hole in a soundboard (as of a violin) designed to resonate with the tones
thumbhole
the hole in a woodwind that is closed and opened with the thumb
judas
a one-way peephole in a door
pinhole
a small puncture that might have been made by a pin
pinprick
small puncture (as if made by a pin)
smoke hole
a vent (as in a roof) for smoke to escape
thumbhole
a finger hole made to fit the thumb (as in a bowling ball)