F
- Facile – easily accomplished, ready or fluent, superficial
- Faction – a small organized dissenting group within a large one, especially in politics
- Factotum – handyman, person who does all kind of work
- Falter – hesitate
- Fanaticism – excessive zeal, extreme devotion
- Fathom – comprehend, investigate
- Feign – pretend
- Felicity – happiness, appropriateness
- Fervent – hot, burning or glowing, having or showing great emotion or zeal.
- Fiasco – total failure
- Filch – steal
- Finicky – too particular, fussy
- Firebrand – trouble maker, hothead
- Fitful – not regular or steady
- Flagrant – conspicuously wicked, outrageous
- Flamboyant – confidence, tending to attract attention because of their exuberance(of a person or their behavior)
- Florid – having a red or flushed complexion, rosy cheeked, fancy, flamboyant
- Flounder – struggle mentally, splash, stumble, fumble, show or feel great confusion, struggle clumsily in mud or water
- Flux – series of changes
- Foil – halt, frustrate, thwart
- Foment – instigate, provoke
- Foolhardy – rash, risky
- Forbearance – patience
- Foreboding – a feeling that something bad will happen, anxiety, apprehension
- Forsake – desert, abandon, renounce
- Forswear – renounce, reject, avoid, refuse
- Forte – strong point or special talent
- Forthright – straightforward, direct, frank
- Fortitude – bravery, courage
- Foster – rear, encourage
- Founder – fail completely
- Fractious – unruly, disobedient, irritable
- Frail – weak and delicate (person)
- Fraught – filled or charged with
