Twirl — to spin; rhymes with whirl and swirl (also to spin); also rhymes with furl and curl (to roll up) and burl (a rounded growth on a tree). So…it seems there is pattern here with words containing an “irl” sound. Can we take it further? Pearl? Well, it’s round. Earl? Maybe round if he eats a lot. Not sure about girl…unless she’s dining with the earl. Hurl? Maybe throwing…in an arc? Churl — a peasant (okay, so we’re losing the connection here); terlet (Archie Bunker’s pronunciation for toilet…and it would, of course, swirl when flushed). And a squirrel might run in circles. Well, enough speculating on “irl” sounds. I have to get up earl-y.