cycle per second vs hertz

cycle per second and hertz both are nouns.

Word	Noun	Adjective	Verb	Adverb
cycle per second	Yes	No	No	No
hertz	Yes	No	No	No

As nouns, cycle per second and hertz are synonyms defined as:

cycle per second and hertz: the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz)

Other synonyms of cycle per second include cps, cycle, cycles/second, Hz.

cycle per second (noun)	hertz (noun)
the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz)	the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz)