violinist vs fiddler

violinist and fiddler both are nouns.

Word	Noun	Adjective	Verb	Adverb
violinist	Yes	No	No	No
fiddler	Yes	No	No	No

As nouns, violinist and fiddler are synonyms defined as:

violinist (noun)	fiddler (noun)
a musician who plays the violin	a musician who plays the violin
	an unskilled person who tries to fix or mend
	someone who manipulates in a nervous or unconscious manner