simplification vs riddance

simplification and riddance both are nouns.

Word	Noun	Adjective	Verb	Adverb
simplification	Yes	No	No	No
riddance	Yes	No	No	No

As nouns, riddance is a hypernym of simplification; that is, riddance is a word with a broader meaning than simplification:

Other hypernyms of simplification include elimination.

simplification (noun)	riddance (noun)
elimination of superfluous details	the act of forcing out someone or something
the act of reducing complexity	the act of removing or getting rid of something
an explanation that omits superfluous details and reduces complexity