Saying trebuchet is a fancy word for catapult is the same as saying diesel is a fancy word for gasoline. Two very different processes from construction to application.
Plus, trebuchet is more fun to say.
And technically, on most IQ tests I score "below average", but that's because IQ tests aren't capable of measuring intelligence or cognitive processes. The primary use of IQ tests is to identify people who think in the same method as the person who made the test. They are also very effective at measuring spelling, something my dyslexic derriere struggles with.