doodle vs scribble

doodle and scribble both are nouns.

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

As nouns, doodle and scribble are synonyms defined as:

Other synonyms of doodle include scrabble.

doodle (noun)	scribble (noun)
an aimless drawing	an aimless drawing
	poor handwriting

doodle (verb)	scribble (verb)
make a doodle; draw aimlessly	write down quickly without much attention to detail
	write carelessly