signpost vs fingerboard

signpost and fingerboard both are nouns.

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

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

Other hyponyms of signpost include fingerpost.

signpost (noun)	fingerboard (noun)
a post bearing a sign that gives directions or shows the way	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 guidepost resembling a hand with a pointing index finger

signpost (verb)	fingerboard (verb)
mark with a signpost, as of a path