fingerboard vs piano keyboard

fingerboard and piano keyboard both are nouns.

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

As nouns, fingerboard and piano keyboard are synonyms defined as:

Other synonyms of fingerboard include clavier.

fingerboard (noun)	piano keyboard (noun)
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	a bank of keys on a musical instrument
a bank of keys on a musical instrument
a guidepost resembling a hand with a pointing index finger