devotion vs loyalty

devotion and loyalty both are nouns.

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

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

devotion: commitment to some purpose
loyalty: the act of binding yourself (intellectually or emotionally) to a course of action

Other hypernyms of devotion include allegiance, commitment, dedication.

devotion (noun)	loyalty (noun)
(usually plural) religious observance or prayers (usually spoken silently)	the act of binding yourself (intellectually or emotionally) to a course of action
commitment to some purpose	the quality of being loyal
religious zeal; the willingness to serve God	feelings of allegiance
feelings of ardent love