Synonyms of uneconomical

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