Cape

DEF: The tip of a landmass that extends out into water.

EX: Ca Mau is a cape at the Southern tip of Vietnam.

Merriam-Webster Online Dictionary
cape (noun)
1.
a point or extension of land jutting out into water as a peninsula or as a projecting point
2.
often capitalized - cape cod cottage
cape (noun)
1.
a sleeveless outer garment or part of a garment that fits closely at the neck and hangs loosely over the shoulders
2.
the short feathers covering the shoulders of a fowl - see duck illustration