KEY: Cogitate.
SYN: Think, ruminate, reflect, meditate, brood, speculate,contemplate, ponder, muse.
ANT: Idle, maunder, dream.

• Unfriendly
• Unfruitful, [See FRIENDLY]
• Ungainly
• Ungovernable
• Ungraceful
• Ungrateful
• Ungulp, [See GULP]
• Unhandy
• unhappiness
• Unhappy
• Unhealthy, [See BEHALF]
• Uniform
• Uninteresting
• Uninterrupted
• Union
• Unique
• Unison
• Unit
• Unite
• Unity
• Universal
• Unjust, [See COMMON]
• Unknown
• Unlawful, [See OBSCURE]
• Unlearned, [See EAST]