corollary vs aftermath

corollary and aftermath both are nouns.

Word	Noun	Adjective	Verb	Adverb
corollary	Yes	No	No	No
aftermath	Yes	No	No	No

As nouns, aftermath is a hypernym of corollary; that is, aftermath is a word with a broader meaning than corollary:

Other hypernyms of corollary include consequence.

corollary (noun)	aftermath (noun)
(logic) an inference that follows directly from the proof of another proposition	the outcome of an event especially as relative to an individual
a practical consequence that follows naturally	the consequences of an event (especially a catastrophic event)