faithfulness vs loyalty

faithfulness and loyalty both are nouns.

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

As nouns, loyalty is a hyponym of faithfulness; that is, loyalty is a word with a more specific, narrower meaning than faithfulness:

Other hyponyms of faithfulness include constancy, dedication, trueness.

faithfulness (noun)	loyalty (noun)
the quality of being faithful	the act of binding yourself (intellectually or emotionally) to a course of action
	the quality of being loyal
	feelings of allegiance