cembalo vs spinet

cembalo and spinet both are nouns.

Word	Noun	Adjective	Verb	Adverb
cembalo	Yes	No	No	No
spinet	Yes	No	No	No

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

cembalo: a clavier with strings that are plucked by plectra mounted on pivots
spinet: early model harpsichord with only one string per note

Other hyponyms of cembalo include pair of virginals, virginal.

cembalo (noun)	spinet (noun)
a clavier with strings that are plucked by plectra mounted on pivots	early model harpsichord with only one string per note
	a small and compactly built upright piano