KEY: Active.
SYN: Nimble, agile, lively, sprightly, brisk, quick, expert,dexterous, supple, wide-awake, prompt, busy, industrial, diligent.
ANT: Slow, inactive, Indolent, sluggish, heavy.

• Decipher
• Decision
• Decisive, [See CONCLUSIVE]
• Deck, [See ADORN]
• Declaim
• Declamation
• Declamatory
• Declaration
• Declension
• Decline, #N/A, [See {[CEPT]?}]
• Declivity
• Decoction
• Decompose
• Decomposition, [See DECOMPOSE]
• Decorate, [See ADORN], Decorum
• Decoy
• Decrease \v
• Decree
• Decrement, [See AUGMENTATION]
• Decrepit
• Decrepitude, [See DECREPIT]
• Decry
• Dedicate
• Deduce
• Deduct