heedfulness vs mindfulness

heedfulness and mindfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
heedfulness	Yes	No	No	No
mindfulness	Yes	No	No	No

As nouns, heedfulness and mindfulness are synonyms defined as:

heedfulness and mindfulness: the trait of staying aware of (paying close attention to) your responsibilities

heedfulness (noun)	mindfulness (noun)
the trait of staying aware of (paying close attention to) your responsibilities	the trait of staying aware of (paying close attention to) your responsibilities