accurate vs hi-fi

accurate is not a noun while hi-fi is a noun.

Word	Noun	Adjective	Verb	Adverb
accurate	No	Yes	No	No
hi-fi	Yes	Yes	No	No

accurate (noun)	hi-fi (noun)
	the reproduction of sound with little or no distortion
	equipment for the reproduction of sound with high fidelity

accurate (adjective)	hi-fi (adjective)
conforming exactly or almost exactly to fact or to a standard or performing with total accuracy	characterized by minimal distortion in sound reproduction
(of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth; strictly correct