kc vs kilocycle per second

kc and kilocycle per second both are nouns.

Word	Noun	Adjective	Verb	Adverb
kc	Yes	No	No	No
kilocycle per second	Yes	No	No	No

As nouns, kc and kilocycle per second are synonyms defined as:

Other synonyms of kc include kHz, kilocycle, kilohertz.

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