air hole
annulet
armhole
blowhole
bullet-hole
bunghole
circlet
cringle
deadeye
eye
eyelet
gasket
grom
guide
keyhole
knothole
loop
loophole
manhole
mousehole
peephole
pigeonhole
pinhole
placket
placket hole
porthole
punch-hole
ringlet
roundlet
spiracle
tap
vent
venthole
fastener
fastening
fixing
holdfast
grommets
airhose
casters
choker
denture
diskettes
eyecup
flightsuit
manilla
obturator
pessary
thumbscrew