kc vs kHz

kc and kHz both are nouns.

Word	Noun	Adjective	Verb	Adverb
kc	Yes	No	No	No
kHz	Yes	No	No	No

As nouns, kc and kHz are synonyms defined as:

Other synonyms of kc include kilocycle, kilocycle per second, kilohertz.

kc (noun)	kHz (noun)
one thousand periods per second	one thousand periods per second