greed vs deadly sin

greed and deadly sin both are nouns.

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

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

greed: reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins)
deadly sin: an unpardonable sin entailing a total loss of grace

Other hypernyms of greed include mortal sin.

greed (noun)	deadly sin (noun)
reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins)	an unpardonable sin entailing a total loss of grace
excessive desire to acquire or possess more (especially more material wealth) than one needs or deserves