I. noun
1.
Synonyms: extravagance 2, extravagancy, lavishness, overdoing, prodigality, squander, waste, wastefulness
Antonyms: thrift
2.
Synonyms: spendthrift , high roller, prodigal, profligate, scattergood, spender, squanderer, waster, wastethrift, wastrel
II. adjective
Synonyms: improvident , thriftless, unthrifty