Synonyms for Hertz (same or very similar meaning)
WordNet sense 1 (the unit of frequency; one hertz has a periodic interval of one second):
cycle, cps, cycles/second, Hz, cycle per secondWordNet sense 2 (German physicist who was the first to produce electromagnetic waves artificially (1857-1894)):
Heinrich Hertz, Heinrich Rudolph HertzWordNet sense 3 (German physicist who with James Franck proved the existence of the stationary energy states postulated by Bohr (1887-1975)):
Gustav Hertz, Gustav Ludwig HertzFrom the ODE community, based on WordNetadd/edit