heedlessness vs imprudence

heedlessness and imprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
heedlessness	Yes	No	No	No
imprudence	Yes	No	No	No

As nouns, imprudence is a hypernym of heedlessness; that is, imprudence is a word with a broader meaning than heedlessness:

heedlessness (noun)	imprudence (noun)
the trait of forgetting or ignoring your responsibilities	a lack of caution in practical affairs
the trait of acting rashly and without prudence
a lack of attentiveness (as to children or helpless people)