WordNet sense 1 (a tool consisting of several hooks for grasping and holding; often thrown with a rope):

grapnel, grappler, grappling hook, grappling iron

WordNet sense 2 (a dredging bucket with hinges like the shell of a clam):

clamshell

WordNet sense 3 (come to terms or deal successfully with):

contend, cope, deal, manage, get by, make out

WordNet sense 4 (to grip or seize, as in a wrestling match):

grip

WordNet sense 5 (the act of engaging in close hand-to-hand combat):

wrestle, wrestling, grappling, hand-to-hand struggle