N irresolution, infirmity of purpose, indecision, indetermination, undetermination, unsettlement, uncertainty, demur, suspense, hesitating, hesitation, hesitancy, vacillation, changeableness, fluctuation, alternation, caprice, fickleness, levity, legerete, pliancy, weakness, timidity, cowardice, half measures, waverer, ass between two bundles of hay, shuttlecock, butterfly, wimp, doughface, irresolute, infirm of purpose, double-minded, half-hearted, undecided, unresolved, undetermined, shilly-shally, fidgety, tremulous, hesitating, off one's balance, at a loss, vacillating, unsteady, unsteadfast, fickle, without ballast, capricious, volatile, frothy, light, lightsome, light-minded, giddy, fast and loose, weak, feeble-minded, frail, timid, wimpish, wimpy, cowardly, dough-faced, facile, pliant, unable to say 'no', easy-going revocable, reversible, irresolutely, irresolved, irresolvedly, in faltering accents, off and on, from pillar to post, seesaw, Int, how happy could I be with either!.

Also see definition of "fickleness" in Bible Study Dictionaries
For further exploring for "fickleness" in Webster Dictionary Online

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