expulsion vs ejection

expulsion and ejection both are nouns.

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

As nouns, expulsion and ejection are synonyms defined as:

Other synonyms of expulsion include forcing out, projection.

As nouns, expulsion and ejection are synonyms defined as:

Other synonyms of expulsion include exclusion, riddance.

expulsion (noun)	ejection (noun)
the act of expelling or projecting or ejecting	the act of forcing out someone or something
the act of forcing out someone or something	the act of expelling or projecting or ejecting
squeezing out by applying pressure