contortion (n.)

• anamorphism
• anamorphosis
• asymmetry
• buckle
• crookedness
• deviation
• disproportion
• distortion
• gnarl
• imbalance
• irregularity
• knot
• lopsidedness
• quirk
• screw
• torsion
• tortuosity
• turn
• twist
• warp
• wrench
• wring