superannuation vs dismission

superannuation and dismission both are nouns.

Word	Noun	Adjective	Verb	Adverb
superannuation	Yes	No	No	No
dismission	Yes	No	No	No

As nouns, dismission is a hypernym of superannuation; that is, dismission is a word with a broader meaning than superannuation:

superannuation: the act of discharging someone because of age (especially to cause someone to retire from service on a pension)
dismission: the termination of someone's employment (leaving them free to depart)

Other hypernyms of superannuation include discharge, dismissal, firing, liberation, release, sack, sacking.

superannuation (noun)	dismission (noun)
the act of discharging someone because of age (especially to cause someone to retire from service on a pension)	the termination of someone's employment (leaving them free to depart)
the property of being out of date and not current	official notice that you have been fired from your job
a monthly payment made to someone who is retired from work