Synonyms of thriftless

2 Syllables
lavish, thoughtless, heedless, shiftless, firstclass, reckless
3 Syllables
imprudent, profuse, pound-foolish, shortsighted, unthrifty, prodigal, negligent, wasteful
4 Syllables
profligate, improvident, extravagant, profusive
5 Syllables
dissipative, overgenerous
6 Syllables
uneconomical, inconsiderate