Fickleness
Part of speech: noun
Definition: the quality of being fickle
Inconstancy
Part of speech: noun
Definition: Lack of constancy; lack of consistency in thought, emotion or action.
Fickleness as a noun is the quality of being fickle while Inconstancy as a noun is lack of constancy; lack of consistency in thought, emotion or action.
Part of speech: noun
Definition: the quality of being fickle
Part of speech: noun
Definition: Lack of constancy; lack of consistency in thought, emotion or action.
We hope you now know whether to use Fickleness or Inconstancy in your sentence.