KEY: Formation.
SYN: Shape, structure, construction.
ANT: Deformity, malformation, dislocation, distortion.

• Unhappy
• Unhealthy, [See BEHALF]
• Uniform
• Uninteresting
• Uninterrupted
• Union
• Unique
• Unison
• Unit
• Unite
• Unity
• Universal
• Unjust, [See COMMON]
• Unknown
• Unlawful, [See OBSCURE]
• Unlearned, [See EAST]
• Unlike, [See LEARNED]
• Unlimited, [See_PURE]
• Unlucky, [See BOUNDLESS]
• Unmistakable
• Unnecessary
• Unpardonable
• Unpleasant, [See PARDONABLE]
• Unprecedented
• Unprincipled, [See EXCEPTIONAL_and_RARE]