inadvertence vs heedlessness

inadvertence and heedlessness both are nouns.

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

As nouns, inadvertence and heedlessness are synonyms defined as:

inadvertence and heedlessness: the trait of forgetting or ignoring your responsibilities

Other synonyms of inadvertence include inadvertency, unmindfulness.

inadvertence (noun)	heedlessness (noun)
the trait of forgetting or ignoring your responsibilities	the trait of forgetting or ignoring your responsibilities
an unintentional omission resulting from failure to notice something	the trait of acting rashly and without prudence
	a lack of attentiveness (as to children or helpless people)