Synonyms for Improvident (same or very similar meaning)
WordNet sense 1 (not given careful consideration):
ill-considered, ill-judgedWordNet sense 2 (not prudent or wise):
imprudentWordNet sense 3 (lacking foresight or scope):
myopic, short, shortsighted, unforesightfulWordNet sense 4 (marked by rash extravagance):
prodigalFrom the ODE community, based on WordNetadd/edit