A hurdle is a barrier to jump over, or more broadly an obstacle to overcome, such as a hurdle before graduation. Hurtle means to move rapidly and violently, often out of control, like a car hurtling down a hill. One is a thing you clear; the other describes how something moves.
The core difference
Hurdle is a barrier or obstacle you clear; hurtle is to move fast and violently.
- hurdle — a barrier to jump over, or a difficulty to overcome: Getting funding was the biggest hurdle for the new business.
- hurtle — to move rapidly, violently or without control: The car hurtled down the hill with the brakes gone.
How to tell them apart
Hurdle began as an Old English word for a woven frame of twigs used as a temporary fence, and the racing sense of a barrier to leap grew directly out of that literal fence. Hurtle, by contrast, has always carried a sense of force and speed, from throwing something hard to colliding or rushing headlong.
A quick check: if you can swap in "obstacle" or "jump over," you want hurdle. If you can swap in "rush" or "hurl," you want hurtle. The words are often confused in sentences about racing, where both a hurdle (the barrier) and hurtling (the speed of the run) can appear together.
