haven

basin, dock, marina, moorage, mooring

arm, bay, bight, cove, creek [chiefly British], embayment, estuary, firth, fjord (also fiord), gulf, inlet, lagoon, loch [Scottish], lough [chiefly Irish], narrow, roads, roadstead

canal, channel, sound, strait

containerport, home port, seaport

oasis

anchorage, mooring, port

cover, screen

abode, diggings, domicile, dwelling, habitation, house, housing, lodging, lodgment (or lodgement), pad, place, quarters, residence, rest, roof

cloister, closet, covert, den, hermitage, hideaway, hideout, lair

castle, fastness, fort, fortress, palisade, redoubt, stronghold

lean-to, lee, shed, windbreak