dismissal vs pink slip

dismissal and pink slip both are nouns.

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

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

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

Other synonyms of dismissal include dismission.

dismissal (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
a judgment disposing of the matter without a trial
official notice that you have been fired from your job
permission to go; the sending away of someone