Synonyms and related words :
bonus, buried treasure, castaway, castoff, derelict, discard, discovery, dogie, find, finding, flotsam, flotsam and jetsam, gravy, jetsam, junk, lagan, orphan, outcast, refuse, reject, rubbish, stray, trash, treasure trove, trouvaille, trove, waif, waifs, waifs and strays, wastrel, windfall, windfall money, windfall profit