flange

n. （火车车轮的）凸缘，轮缘

flail, flair, flak, flak jacket, flake, flakiness, flaky, flambe, flamboyance, flamboyant, flamboyantly, flame, flame out, flame-thrower, flamenco, flaming, flamingo, flammability, flammable, flan, flank, flannel, flannelette, flap, flapjack, flapper, flare, flare up, flare-path, flare-up, flash, flash card, flash cube, flash out, flash-flood, flash-gun, flash-locks, flash-point, flashback, flashbulb,