KEY: Flexion, [See FLEXIBLE].
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KEY: Flexure, [See FLEXION].
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KEY: Flicker.
SYN: Flutter, quiver, bicker, falter, waver, glimmer, shimmer, scintillate.
ANT: Stream, blaze, gleam, shine, beam.
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KEY: Flight.
SYN: Volitation, departure, escape, evasion, disappearance, flying, stampede, soaring, begin, fleeing, exodus.