faithfulness vs faithful

faithfulness and faithful both are nouns.

Word	Noun	Adjective	Verb	Adverb
faithfulness	Yes	No	No	No
faithful	Yes	Yes	No	No

faithfulness (noun)	faithful (noun)
the quality of being faithful	a group of people who adhere to a common faith and habitually attend a given church
	any loyal and steadfast following

faithfulness (adjective)	faithful (adjective)
	steadfast in affection or allegiance
	not having sexual relations with anyone except your husband or wife, or your boyfriend or girlfriend
	marked by fidelity to an original