loyalty vs fidelity

loyalty and fidelity both are nouns.

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

As nouns, fidelity is a hypernym of loyalty; that is, fidelity is a word with a broader meaning than loyalty:

Other hypernyms of loyalty include faithfulness.

loyalty (noun)	fidelity (noun)
the act of binding yourself (intellectually or emotionally) to a course of action	the quality of being faithful
the quality of being loyal	accuracy with which an electronic system reproduces the sound or image of its input signal
feelings of allegiance