The Collaborative International Dictionary of English v.0.48:

Incurve \In*curve"\ ([i^]n*k[^u]v"), v. t. [imp. & p. p.
   Incurved ([i^]n*k[^u]vd"); p. pr. & vb. n. Incurving.]
   [See Incurvate.]
   To bend; to curve; to make crooked.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "incurve":
   arch, bend, bend back, bow, bowl, cast, change of pace, change-up,
   chuck, chunk, crook, cup, curl, curve, decurve, deflect, dish,
   dome, downcurve, embow, fastball, flex, fling, flip, forward pass,
   heave, hollow, hook, hump, hunch, hurl, incurvate, inflect,
   knuckleball, lateral, lateral pass, lob, loop, outcurve, pass, peg,
   pitch, put, recurve, reflect, reflex, retire, retreat, retroflex,
   round, sag, screwball, serve, service, shot-put, shy, sinker,
   slider, sling, spitball, spitter, swag, sweep, throw, toss, turn,
   upcurve, vault, wind