dismission vs pink slip

dismission and pink slip both are nouns.

Word	Noun	Adjective	Verb	Adverb
dismission	Yes	No	No	No
pink slip	Yes	No	No	No

As nouns, dismission and pink slip are synonyms defined as:

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

Other synonyms of dismission include dismissal.

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