FLEXIBLE—pliant, pliable, ductile. (Inflexible.)
FLOURISH—prosper, thrive. (Decay.)
FLUCTUATING—wavering, hesitating, oscillating, vacillating, change. (Firm, steadfast, decided.)
FLUENT—flowing, glib, voluble, unembarrassed, ready. (Hesitating.)
FOLKS—persons, people, individuals.
FOLLOW—succeed, ensue, imitate, copy, pursue.
FOLLOWER—partisan, disciple, adherent, retainer, pursuer, successor.
FOLLY—silliness, foolishness, imbecility, weakness. (Wisdom.)
FOND—enamored, attached, affectionate. (Distant.)
FONDNESS—affection, attachment, kindness, love. (Aversion.)