keyboard vs fingerboard

keyboard and fingerboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
keyboard	Yes	No	No	No
fingerboard	Yes	No	No	No

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

keyboard: device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
fingerboard: a bank of keys on a musical instrument

Other hyponyms of keyboard include computer keyboard, keypad, clavier, piano keyboard, typewriter keyboard.

keyboard (noun)	fingerboard (noun)
holder consisting of an arrangement of hooks on which keys or locks can be hung	a narrow strip of wood on the neck of some stringed instruments (violin or cello or guitar etc) where the strings are held against the wood with the fingers
device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like	a bank of keys on a musical instrument
	a guidepost resembling a hand with a pointing index finger