hertz / hurts are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
hertz: (noun) the unit of frequency; one hertz has a periodic interval of one second. (noun) German physicist who was the first to produce electromagnetic waves artificially (1857-1894). (noun) German physicist who with James Franck proved the existence of the stationary energy states postulated by Bohr (1887-1975).
hurts: (verb) give trouble or pain to. (verb) cause damage or affect negatively. (verb) hurt the feelings of. (verb) feel physical pain.
hertz: hh·EH·r·t·s
hurts: hh·ER·t·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)