whirl / whorl 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. 👇
whirl: (noun) confused movement. (noun) the shape of something rotating rapidly. (verb) cause to spin. (verb) fly around.
whorl: NA
whirl: w·ER·l
whorl: w·ER·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)