fingerboard vs fingerpost

fingerboard and fingerpost both are nouns.

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

As nouns, fingerboard and fingerpost are synonyms defined as:

fingerboard and fingerpost: a guidepost resembling a hand with a pointing index finger

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