romp vs indulgence

romp and indulgence both are nouns.

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

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

romp (noun)	indulgence (noun)
gay or light-hearted recreational activity for diversion or amusement	the act of indulging or gratifying a desire
an easy victory	foolish or senseless behavior
a girl who behaves in a boyish manner	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