ejection vs propulsion

ejection and propulsion both are nouns.

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

As nouns, propulsion is a hypernym of ejection; that is, propulsion is a word with a broader meaning than ejection:

Other hypernyms of ejection include actuation.

ejection (noun)	propulsion (noun)
the act of forcing out someone or something	the act of propelling
the act of expelling or projecting or ejecting	a propelling force