central processor vs CPU

central processor and CPU both are nouns.

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

As nouns, central processor and CPU are synonyms defined as:

central processor and CPU: (computer science) the part of a computer (a microprocessor chip) that does most of the data processing

Other synonyms of central processor include C.P.U., central processing unit, mainframe, processor.

central processor (noun)	CPU (noun)
(computer science) the part of a computer (a microprocessor chip) that does most of the data processing	(computer science) the part of a computer (a microprocessor chip) that does most of the data processing