dismiss vs dismission

dismiss is not a noun while dismission is a noun.

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

dismiss (noun)	dismission (noun)
	the termination of someone's employment (leaving them free to depart)
	official notice that you have been fired from your job

dismiss (verb)	dismission (verb)
declare void
bar from attention or consideration
end one's encounter with somebody by causing or permitting the person to leave
cease to consider; put out of judicial consideration
terminate the employment of; discharge from an office or position
stop associating with