| ellipse(noun, bend, bow, loop, curve) |
| entanglement(noun, connection, tie, bow, tangle) |
| evolute |
| flexure(noun, twist, bend, bow, loop) |
| gnarl(noun, twist, connection, tie, bow) |
| hairpin(noun, bend, bow, loop, arch) |
| half-moon(noun, bend, bow, loop, curve) |
| helical |
| helical motion(expression, idiom, rotation) |
| helixes |
| hitch(noun, connection, tie, bow, tangle) |
| horseshoe(noun, bend, bow, loop, curve) |
| hyperbola(noun, bend, bow, loop, curve) |
| incurvation(noun, bend, bow, loop, curve) |
| incurvature(noun, bend, bow, loop, curve) |
| involute |
| involution |
| jerk(noun, turn, twist, wind, screw) |
| joint(noun, twist, connection, tie, bow) |
| ligament(noun, twist, connection, tie, bow) |