screenplay vs script

screenplay and script both are nouns.

Word	Noun	Adjective	Verb	Adverb
screenplay	Yes	No	No	No
script	Yes	No	Yes	No

As nouns, script is a hypernym of screenplay; that is, script is a word with a broader meaning than screenplay:

screenplay: a script for a film including dialogue and descriptions of characters and sets
script: a written version of a play or other dramatic composition; used in preparing for a performance

Other hypernyms of screenplay include book, playscript.

screenplay (noun)	script (noun)
a script for a film including dialogue and descriptions of characters and sets	a written version of a play or other dramatic composition; used in preparing for a performance
	a particular orthography or writing system
	something written by hand

screenplay (verb)	script (verb)
	write a script for