hoarse / horse 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. 👇
hoarse: NA
horse: (noun) solid-hoofed herbivorous quadruped domesticated since prehistoric times. (noun) a padded gymnastic apparatus on legs. (verb) provide with a horse or horses.
hoarse: hh·AO·r·s
horse: hh·AO·r·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)