dismissal vs dismission

dismissal and dismission both are nouns.

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

As nouns, dismissal and dismission are synonyms defined as:

dismissal and dismission: the termination of someone's employment (leaving them free to depart)

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

As nouns, dismissal and dismission are synonyms defined as:

dismissal and dismission: official notice that you have been fired from your job

Other synonyms of dismissal include pink slip.

dismissal (noun)	dismission (noun)
the termination of someone's employment (leaving them free to depart)	the termination of someone's employment (leaving them free to depart)
a judgment disposing of the matter without a trial	official notice that you have been fired from your job
official notice that you have been fired from your job
permission to go; the sending away of someone