riddance vs ejection

riddance and ejection both are nouns.

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

As nouns, riddance and ejection are synonyms defined as:

Other synonyms of riddance include exclusion, expulsion.

riddance (noun)	ejection (noun)
the act of forcing out someone or something	the act of forcing out someone or something
the act of removing or getting rid of something	the act of expelling or projecting or ejecting