scribbler vs writer

scribbler and writer both are nouns.

Word	Noun	Adjective	Verb	Adverb
scribbler	Yes	No	No	No
writer	Yes	No	No	No

As nouns, writer is a hypernym of scribbler; that is, writer is a word with a broader meaning than scribbler:

scribbler (noun)	writer (noun)
a writer whose handwriting is careless and hard to read	writes (books or stories or articles or the like) professionally (for pay)
informal terms for journalists	a person who is able to write and has written something