KEY: Riddle.
SYN: Puzzle, enigma, ambiguity, problem, paradox.
ANT: Solution, explanation, statement, proposition, axiom.

• Fawn_upon
• Fealty, [See FIDELITY]
• Fear
• Fearful
• Fearless, [See COURAGEOUS]
• Feasible
• Featly, [See FEAT]
• Feat, [See ACHIEVEMENT]
• Feature
• Federation, [See CONFEDERACY]
• Feeble
• Feeling
• Feign, [See PRETEND]
• Feint, [See FEIGN]
• Felicitate, [See CONGRATULATE]
• Felicitous
• Felicity, [See FELICITOUS]
• Fell
• Fell
• Fellow
• Fellowship
• Feminine
• Fence
• Ferine, [See SAVAGE]
• Ferment