Synonyms of wasteful

Adjective

1. uneconomical, wasteful, inefficient (vs. efficient)

usage: inefficient in use of time and effort and materials; "a clumsy and wasteful process"; "wasteful duplication of effort"; "uneconomical ebb and flow of power"

2. wasteful (vs. thrifty), extravagant, prodigal, profligate, spendthrift, pound-foolish, uneconomical, uneconomic, improvident

usage: tending to squander and waste

3. wasteful, destructive (vs. constructive)

usage: laying waste; "when wasteful war shall statues overturn"- Shakespeare

Definition and meaning of wasteful (Dictionary)