reparation vs atonement

reparation and atonement both are nouns.

Word	Noun	Adjective	Verb	Adverb
reparation	Yes	No	No	No
atonement	Yes	No	No	No

As nouns, atonement is a hypernym of reparation; that is, atonement is a word with a broader meaning than reparation:

reparation: something done or paid in expiation of a wrong
atonement: the act of atoning for sin or wrongdoing (especially appeasing a deity)

Other hypernyms of reparation include expiation, propitiation.

reparation (noun)	atonement (noun)
something done or paid in expiation of a wrong	the act of atoning for sin or wrongdoing (especially appeasing a deity)
the act of putting something in working order again	compensation for a wrong
(usually plural) compensation exacted from a defeated nation by the victors
compensation (given or received) for an insult or injury