bastion
beachhead
blockhouse
bridgehead
bunker
castle
citadel
donjon
fasthold
fastness
fort
fortress
garrison
garrison house
hold
keep
martello
martello tower
mote
motte
peel
peel tower
pillbox
post
rath
safehold
strong point
stronghold
tower
tower of strength
ward
colonnaded
ex-presidents
faddist
fishpond
harbouring
hypocaust
indivisibility
ivory-tower
lumber-room
pieman
proselytising
seclude
statehouse
symbolization
terrible
theorising
unbreathed
unchastity
ungratefulness
watchtower
Heliopolis
Megalopolis
Papadopoulos
megalopolis
metropolis
necropolis