From WordNet (r) 3.0 (2006) [wn]:
cast out
v 1: expel from a community or group [syn: banish, ban,
ostracize, ostracise, shun, cast out, blackball]
2: throw or cast away; "Put away your worries" [syn: discard,
fling, toss, toss out, toss away, chuck out, {cast
aside}, dispose, throw out, cast out, throw away,
cast away, put away]