central processor vs hardware

central processor and hardware both are nouns.

Word	Noun	Adjective	Verb	Adverb
central processor	Yes	No	No	No
hardware	Yes	No	No	No

As nouns, hardware is a hypernym of central processor; that is, hardware is a word with a broader meaning than central processor:

central processor: (computer science) the part of a computer (a microprocessor chip) that does most of the data processing
hardware: (computer science) the mechanical, magnetic, electronic, and electrical components making up a computer system

Other hypernyms of central processor include electronic equipment, computer hardware.

central processor (noun)	hardware (noun)
(computer science) the part of a computer (a microprocessor chip) that does most of the data processing	(computer science) the mechanical, magnetic, electronic, and electrical components making up a computer system
	major items of military weaponry (as tanks or missile)
	instrumentalities (tools or implements) made of metal