indulging vs orgy

indulging and orgy both are nouns.

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

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

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

indulging (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
	any act of immoderate indulgence
	a wild gathering involving excessive drinking and promiscuity