dramatis personae vs cast of characters

dramatis personae and cast of characters both are nouns.

Word	Noun	Adjective	Verb	Adverb
dramatis personae	Yes	No	No	No
cast of characters	Yes	No	No	No

As nouns, dramatis personae and cast of characters are synonyms defined as:

Other synonyms of dramatis personae include cast.

dramatis personae (noun)	cast of characters (noun)
the actors in a play	the actors in a play