immorality vs devilry

immorality and devilry both are nouns.

Word	Noun	Adjective	Verb	Adverb
immorality	Yes	No	No	No
devilry	Yes	No	No	No

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

Other hyponyms of immorality include deviltry, foul play, irreverence, violation, sexual immorality.

immorality (noun)	devilry (noun)
morally objectionable behavior	wicked and cruel behavior
the quality of not being in accord with standards of right or good conduct	reckless or malicious behavior that causes discomfort or annoyance in others