WordNet sense 1 (something (often something deceptively attractive) that catches you unawares):

snare

WordNet sense 2 (informal terms for the mouth):

gob, hole, maw, yap, cakehole

WordNet sense 3 (a hazard on a golf course):

bunker, sand trap

WordNet sense 4 (catch in or as if in a trap):

ensnare, entrap, trammel

WordNet sense 5 (the act of concealing yourself and lying in wait to attack by surprise):

ambuscade, ambush, lying in wait

WordNet sense 6 (to hold fast or prevent from moving):

immobilize, pin, immobilise