THESAURUS
S-curve, arch, bend, bend back, bending, bow, bowing, cable, conflexure, contract, cord, crook, curl, curve, decurve, deflect, deflection, dome, embow, exercise, extension, flection, flexure, geanticline, geosyncline, give, hairpin turn, hook, hump, hunch, incurvate, incurve, inflect, inflection, lead, loop, meander, oxbow, recurve, reflect, reflection, reflex, retroflex, round, sag, stretch, swag, sweep, tense, tighten, turn, turning, vault, wind, wire
ROGET THESAURUS
Curvature
VB
be curved curve, sweep, sway, swag, sag, deviate, curl, turn, reenter, render curved,
flex, bend, curve, incurvate, inflect, deflect, scatter, refract (light), crook, turn, round, arch, arcuate, arch over, concamerate, bow, curl, recurve, frizzle, rotundity, convexity.
Elasticity
VB
stretch,
flex, extend, distend, be elastic, bounce, spring back.