impeccability vs faultlessness

impeccability and faultlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
impeccability	Yes	No	No	No
faultlessness	Yes	No	No	No

As nouns, impeccability and faultlessness are synonyms defined as:

impeccability and faultlessness: the quality of being without an error or fault

impeccability (noun)	faultlessness (noun)
the quality of being exempt from sin or incapable of sinning	the quality of being without an error or fault
the quality of being without an error or fault