processor vs CPU

processor and CPU both are nouns.

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

As nouns, processor and CPU are synonyms defined as:

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

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

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
a business engaged in processing agricultural products and preparing them for market
someone who processes things (foods or photographs or applicants etc.)