indulgence vs orgy

indulgence and orgy both are nouns.

Word	Noun	Adjective	Verb	Adverb
indulgence	Yes	No	No	No
orgy	Yes	No	No	No

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

Other hyponyms of indulgence include intemperance, intemperateness, self-indulgence, excess, overindulgence, binge, splurge.

indulgence (noun)	orgy (noun)
the act of indulging or gratifying a desire	secret rite in the cults of ancient Greek or Roman deities involving singing and dancing and drinking and sexual activity
foolish or senseless behavior	any act of immoderate indulgence
the remission by the pope of the temporal punishment in purgatory that is still due for sins even after absolution	a wild gathering involving excessive drinking and promiscuity
an inability to resist the gratification of whims and desires
a disposition to yield to the wishes of someone