data processor vs disk cache

data processor and disk cache both are nouns.

Word	Noun	Adjective	Verb	Adverb
data processor	Yes	No	No	No
disk cache	Yes	No	No	No

data processor (noun)	disk cache (noun)
a machine for performing calculations automatically	a cache that stores copies of frequently used disk sectors in random access memory (RAM) so they can be read without accessing the slower disk