This Science News hintergrund contains
hubschrauber, chopper, whirlybird, eggbeater, zerhacker, and quirl.
There might also be
doppeldecker, einzelstütze, einzelne propellerflugzeug, einzelpropellerflugzeug, einzige stütze, einzelnen propeller-flugzeug, wasserflugzeug, floatplane, pontonflugzeug, and ponton-flugzeug.
If Du were looking at two shapes—specifically, a pointy, jagged polygon and an amoeboid-like splotch—which would Du name "bouba," and which would Du name "kiki"? Courtesy of SciFri.