playscript vs dialogue

playscript and dialogue both are nouns.

Word	Noun	Adjective	Verb	Adverb
playscript	Yes	No	No	No
dialogue	Yes	No	No	No

As nouns, dialogue is a hyponym of playscript; that is, dialogue is a word with a more specific, narrower meaning than playscript:

playscript: a written version of a play or other dramatic composition; used in preparing for a performance
dialogue: the lines spoken by characters in drama or fiction

Other hyponyms of playscript include prompt copy, promptbook, continuity, dialog, libretto, scenario, screenplay, shooting script.

playscript (noun)	dialogue (noun)
a written version of a play or other dramatic composition; used in preparing for a performance	the lines spoken by characters in drama or fiction
	a conversation between two persons
	a literary composition in the form of a conversation between two people
	a discussion intended to produce an agreement