Open English Wordnet
Nouns
(n)bridgehead, footholdan area in hostile territory that has been captured and is held awaiting further troops and supplies“an attempt to secure a bridgehead behind enemy lines”,
“the only foothold left for British troops in Europe was Gibraltar” (n)foothold, footinga place providing support for the foot in standing or climbing (n)beachhead, footholdan initial accomplishment that opens the way for further developments“the town became a beachhead in the campaign to ban smoking outdoors”,
“they are presently attempting to gain a foothold in the Russian market”