extravagance vs improvidence

extravagance and improvidence both are nouns.

Word	Noun	Adjective	Verb	Adverb
extravagance	Yes	No	No	No
improvidence	Yes	No	No	No

As nouns, improvidence is a hypernym of extravagance; that is, improvidence is a word with a broader meaning than extravagance:

extravagance: the trait of spending extravagantly
improvidence: a lack of prudence and care by someone in the management of resources

Other hypernyms of extravagance include shortsightedness.

extravagance (noun)	improvidence (noun)
the activity of excessive spending	a lack of prudence and care by someone in the management of resources
the trait of spending extravagantly
the quality of exceeding the appropriate limits of decorum or probability or truth