Hourlong rhymes with:
budlong, chamlong, daylong, furlong, headlong, monthlong, weeklong, birdsong, budlong, chamlong, daylong, furlong, headlong, headstrong, hissong, hussong, hysong, monthlong, plainsong, scuppernong, ssangyong, weeklong
Hourlong sounds like:
harlem's, harlin's, harling, heirlooms, herling, herlong, hurling