Here, don't believe me?

I'll quote the relevant pieces here so its easier for you.

Four wheel drive (4WD) refers to vehicles with two or more axles providing power to four wheel ends.[1] In the North American market the term generally refers to a system that is optimized for severe off-road driving conditions.[6] Four-wheel drive vehicles typically have a transfer case, which locks the front and rear axles, meaning that the front and rear drive shafts will be locked together when engaged. This provides maximum torque transfer to the axle with the most traction, but can cause binding when turning in high traction turning situations.[7]

All wheel drive (AWD) historically was synonymous with "four-wheel drive" on four-wheeled vehicles, and six-wheel drive on 6×6s, and so on, being used in that fashion at least as early as the 1920s.[8][9] Today in the United States the term is applied to both heavy vehicles as well as light passenger vehicles. When referring to heavy vehicles the term is increasingly applied to mean "permanent multiple-wheel drive" on 2×2, 4×4, 6×6 or 8×8 drive train systems that include a differential between the front and rear drive shafts.[10] This is often coupled with some sort of anti-slip technology, increasingly hydraulic-based, that allows differentials to spin at different speeds but still be capable of transferring torque from a wheel with poor traction to one with better. Typical AWD systems work well on all surfaces, but are not intended for more extreme off-road use.[10] When used to describe AWD systems in light passenger vehicles it describes a system that either applies power to all four wheels (permanently or on demand) and targeted as improving on road traction and performance, particularly in inclement conditions, rather than for off road applications.[6]

Also I really appreciate the downvotes. Next time actually look into the thing you're arguing.