mandolin vs mandola

mandolin and mandola both are nouns.

Word	Noun	Adjective	Verb	Adverb
mandolin	Yes	No	No	No
mandola	Yes	No	No	No

As nouns, mandola is a hyponym of mandolin; that is, mandola is a word with a more specific, narrower meaning than mandolin:

mandolin: a stringed instrument related to the lute, usually played with a plectrum
mandola: an early type of mandolin

mandolin (noun)	mandola (noun)
a stringed instrument related to the lute, usually played with a plectrum	an early type of mandolin