hole
hollow
Einstein-Rosen bridge
abiding-place
bagpipe
calk
cavern
chimneystack
clavichord
cutpurse
ex-husband
flageolet
foison
headwall
improvisations
mandore
manilla
muezzin
near-darkness
noisemaker
potpourri
singularity
spinet
spy-hole
suppress
tabor
tendance
tunnel
viol
voyce
yard-dog