bass fiddle vs contrabass

bass fiddle and contrabass both are nouns.

Word	Noun	Adjective	Verb	Adverb
bass fiddle	Yes	No	No	No
contrabass	Yes	Yes	No	No

As nouns, bass fiddle and contrabass are synonyms defined as:

bass fiddle and contrabass: largest and lowest member of the violin family

Other synonyms of bass fiddle include bass viol, bull fiddle, double bass, string bass.

bass fiddle (noun)	contrabass (noun)
largest and lowest member of the violin family	largest and lowest member of the violin family

bass fiddle (adjective)	contrabass (adjective)
	pitched an octave below normal bass instrumental or vocal range