laziness vs deadly sin

laziness and deadly sin both are nouns.

Word	Noun	Adjective	Verb	Adverb
laziness	Yes	No	No	No
deadly sin	Yes	No	No	No

As nouns, deadly sin is a hypernym of laziness; that is, deadly sin is a word with a broader meaning than laziness:

laziness: apathy and inactivity in the practice of virtue (personified as one of the deadly sins)
deadly sin: an unpardonable sin entailing a total loss of grace

Other hypernyms of laziness include mortal sin.

laziness (noun)	deadly sin (noun)
apathy and inactivity in the practice of virtue (personified as one of the deadly sins)	an unpardonable sin entailing a total loss of grace
relaxed and easy activity
inactivity resulting from a dislike of work