tolerance vs indulgence

tolerance and indulgence both are nouns.

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

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

Other hyponyms of tolerance include acceptance, sufferance, toleration, lenience, leniency, overtolerance.

tolerance (noun)	indulgence (noun)
the act of tolerating something	the act of indulging or gratifying a desire
a permissible difference; allowing some freedom to move within limits	foolish or senseless behavior
the power or capacity of an organism to tolerate unfavorable environmental conditions	the remission by the pope of the temporal punishment in purgatory that is still due for sins even after absolution
a disposition to allow freedom of choice and behavior	an inability to resist the gratification of whims and desires
willingness to recognize and respect the beliefs or practices of others	a disposition to yield to the wishes of someone