Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun spendthrift

1 sense of spendthrift

Sense 1
spendthrift, spend-all, spender, scattergood -- (someone who spends money prodigally)
       => prodigal, profligate, squanderer -- (a recklessly extravagant consumer)

Antonyms of adj spendthrift

1 sense of spendthrift

Sense 1
extravagant, prodigal, profligate, spendthrift -- (recklessly wasteful; "prodigal in their expenditures")

INDIRECT (VIA wasteful) -> thrifty -- (careful and diligent in the use of resources)

Similarity of adj spendthrift

1 sense of spendthrift

Sense 1
extravagant, prodigal, profligate, spendthrift -- (recklessly wasteful; "prodigal in their expenditures")
       => wasteful (vs. thrifty) -- (tending to squander and waste)