beachhead

• POS: Noun
• HYPHEN: beach=head

CIDE DICTIONARY

beachhead, n. 

 an area in hostile territory that has been occupied and is held to allow aditional troops and supplies to enter.  [WordNet 1.5]

OXFORD DICTIONARY

beachhead, n. Mil. a fortified position established on a beach by landing forces.

Etymology

after bridgehead

THESAURUS

beachhead

acropolis, advance guard, airhead, avant-garde, bastion, battle line, blockhouse, bridgehead, bunker, castle, citadel, donjon, farthest outpost, fasthold, fastness, first line, forefront, fort, fortress, front, front line, front rank, front-runner, garrison, garrison house, hold, keep, line, martello, martello tower, mote, motte, outguard, outpost, peel, peel tower, pillbox, pioneer, point, post, precursor, railhead, rath, safehold, scout, spearhead, strong point, stronghold, tower, tower of strength, van, vanguard, ward