fickle

  1. liable to sudden unpredictable change

    Synonyms : erratic, mercurial, quicksilver
    Examples :
    • fickle weather
  2. marked by erratic changeableness in affections or attachments

    Synonyms : volatile
    Examples :
    • fickle friends

fervor

  1. the state of being emotionally aroused and worked up

    Synonyms : excitation, excitement, fervour, inflammation
    Type Of : emotional arousal
  2. feelings of great warmth and intensity

    Synonyms : ardor, ardour, fervency, fervidness, fervour, fire
    Type Of : passion, passionateness

felicitous

  1. marked by good fortune

    Synonyms : happy
    Examples :
    • a felicitous life
  2. exhibiting an agreeably appropriate manner or style

    Antonyms : infelicitous
    Examples :
    • a felicitous speaker

fecund

  1. intellectually productive

    Synonyms : fertile, prolific
    Examples :
    • a fecund imagination
  2. capable of producing offspring or vegetation

feasible

  1. capable of being done with means at hand and circumstances as they are

    Synonyms : executable, practicable, viable, workable

fatuous

  1. extremely silly or stupid

    Synonyms : asinine, inane

fastidious

  1. having complicated nutritional requirements; especially growing only in special artificial cultures

    Synonyms : exacting
    Antonyms : unfastidious
    Examples :
    • fastidious microorganisms
  2. giving careful attention to detail; hard to please; excessively concerned with cleanliness

    Antonyms : unfastidious
    Examples :
    • a fastidious and incisive intellect
    • fastidious about personal cleanliness

fanaticism

  1. excessive intolerance of opposing views

    Synonyms : fanatism, zealotry
    Type Of : intolerance

fanatical

  1. marked by excessive enthusiasm for and intense devotion to a cause or idea

    Synonyms : fanatic, overzealous, rabid

falter

  1. speak haltingly

    Synonyms : bumble, stammer, stutter
    Type Of : verbalise, verbalize, utter, mouth, speak, talk
    Examples :
    • The speaker faltered when he saw his opponent enter the room
  2. be unsure or weak

    Synonyms : waver
    Type Of : waver, hesitate, waffle
    Examples :
    • Their enthusiasm is faltering
  3. walk unsteadily

    Synonyms : bumble, stumble
    Type Of : walk
  4. move hesitatingly, as if about to give way

    Synonyms : waver
    Type Of : move
  5. the act of pausing uncertainly

    Synonyms : faltering, hesitation, waver
    Type Of : pause