scribble vs script

scribble and script both are nouns.

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

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

Other hypernyms of scribble include hand, handwriting.

scribble (noun)	script (noun)
an aimless drawing	a written version of a play or other dramatic composition; used in preparing for a performance
poor handwriting	a particular orthography or writing system
	something written by hand

scribble (verb)	script (verb)
write down quickly without much attention to detail	write a script for
write carelessly