KEY: Levity.
SYN: Lightness, frivolity, inconstancy, flightiness, vanity,thoughtlessness.
ANT: Earnestness, gravity, seriousness.

• Fright, [See ALARM]
• Frigid
• Fringed, [See FIMBRIATED]
• Frippery
• Frisk
• Frisky
• Fritter
• Frivolous
• Frolic
• Frolicsome
• Front, [See FACE]
• Froth, [See BALDERDASH]
• Froward
• Frugal
• Fruit
• Fruitful
• Fruition
• Fruitless, [See FRIENDLY]
• Frustrate, [See BAFFLE]
• Frustration, [See FRUSTRATE_and_DISAPPOINTMENT], fleeting,
• Fugacious
• Fugitive, [See FUGACIOUS]
• Fulfil
• fulfill
• Fulminate