"SUV" is too much of a mouthful most of the time. It's also not an SUV, something like the Tahoe, Suburban etc is what I always think of when I hear "SUV". Also sounds a bit pretentious, or like you're trying to make a point... "I drive an SUV"
"Car"; nope, definitely not a car.
"Van"; I cringed when I heard an older / retired gentleman refer to mine as a Van. Decided it was time for some proper rims...
"Truck"; nope, the F150, 1500 etc are trucks. Or the even the new canyon / colorado are trucks.
"Jeep". It's definitely a jeep, says right on the front
. Very easy to pronounce too, so that's what I call it all the time.