kilocycle per second vs kc

kilocycle per second and kc both are nouns.

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

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

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

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