Synonyms and related words :
big-time spender, dissipative, easy come, easy go, extravagant, improvident, incontinent, intemperate, lavish, overgenerous, overlavish, overliberal, penny-wise and pound-foolish, pound-foolish, prodigal, prodigal son, profligate, profuse, spend-all, spender, squanderer, squandering, wasteful, waster, wastethrift, wastrel