castaway (n.)

• derelict
• discard
• disposal
• dogie
• dumping
• elimination
• exile
• expatriate
• flotsam
• foundling
• jetsam
• junk
• lagan
• left
• leper
• orphan
• outcast
• outcaste
• outlaw
• pariah
• refuse
• reject
• rejection
• removal
• rubbish
• throwaway
• trash
• undesirable
• untouchable
• waif
• wastrel