unmindfulness vs inadvertency

unmindfulness and inadvertency both are nouns.

Word	Noun	Adjective	Verb	Adverb
unmindfulness	Yes	No	No	No
inadvertency	Yes	No	No	No

As nouns, unmindfulness and inadvertency are synonyms defined as:

unmindfulness and inadvertency: the trait of forgetting or ignoring your responsibilities

Other synonyms of unmindfulness include heedlessness, inadvertence.

unmindfulness (noun)	inadvertency (noun)
the trait of forgetting or ignoring your responsibilities	the trait of forgetting or ignoring your responsibilities