Napier's bones vs calculator

Napier's bones and calculator both are nouns.

Word	Noun	Adjective	Verb	Adverb
Napier's bones	Yes	No	No	No
calculator	Yes	No	No	No

As nouns, calculator is a hypernym of Napier's bones; that is, calculator is a word with a broader meaning than Napier's bones:

Napier's bones: a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier
calculator: a small machine that is used for mathematical calculations; can be mechanical or electronic

Other hypernyms of Napier's bones include calculating machine.

Napier's bones (noun)	calculator (noun)
a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier	a small machine that is used for mathematical calculations; can be mechanical or electronic
	an expert at calculation (or at operating calculating machines)