indulgence vs meshugaas

indulgence and meshugaas both are nouns.

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

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

Other hyponyms of indulgence include mishegaas, mishegoss, buffoonery, clowning, frivolity, harlequinade, japery, prank.

indulgence (noun)	meshugaas (noun)
the act of indulging or gratifying a desire	(Yiddish) craziness; senseless behavior or activity
foolish or senseless behavior
the remission by the pope of the temporal punishment in purgatory that is still due for sins even after absolution
an inability to resist the gratification of whims and desires
a disposition to yield to the wishes of someone