What's the difference between a cyclone and a hurricane?

Hurricanes are extremely violent cyclones, typically originating near the equator and moving north. Hurricanes are usually accompanied by heavy rains.

Cyclones are violent storms with winds that twist clockwise in the southern hemisphere, and counterclockwise in the northern hemisphere.  

who knows

explanation:

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.