bass viol vs gamba

bass viol and gamba both are nouns.

Word	Noun	Adjective	Verb	Adverb
bass viol	Yes	No	No	No
gamba	Yes	No	No	No

As nouns, bass viol and gamba are synonyms defined as:

bass viol and gamba: viol that is the bass member of the viol family with approximately the range of the cello

Other synonyms of bass viol include viola da gamba.

bass viol (noun)	gamba (noun)
viol that is the bass member of the viol family with approximately the range of the cello	viol that is the bass member of the viol family with approximately the range of the cello
largest and lowest member of the violin family