Parsimony
Part of speech: noun
Definition: Great reluctance to spend money unnecessarily. By analogy from (1), principle of using the least resources or explanations to solve a problem.
Thrift
Part of speech: noun
Definition: The characteristic of using a minimum of something (especially money).A savings bank.Any of various plants of the genus Armeria, particularly Armeria maritima.
Example sentence: I used to go to Saks, I would go to Bergdorf, I would go to Barneys, I would go to thrift stores in SoHo.