it provide the same meaning but different spelling and pronunciation
Spendthrift is another word for improvident. Additional synonyms include careless and extravagent.
an improvident lot
what is the meaning of an improvident lot
careless
The government is being improvident in dealing with the debt crisis.
Ignoring the warning-signs of drought was the most improvident, cavalier thing that the government could do.
His improvident spending habits left him with no savings for emergencies.
dissipate improvident prodigal wastrel profligate squander
"[...]our improvident grandfathers, and fathers and uncles and brothers exchanged the land for their epic fornications - to put it plainly!"
They are synonyms.
Synonyms
Relative and kin are synonyms.