Antonyms of noun inconstancy

1 of 2 senses of inconstancy

Sense 2
inconstancy, changefulness -- (the quality of being changeable and variable)
       Antonym of constancy (Sense 1)
      => constancy, stability -- (the quality of being enduring and free from change or variation; "early mariners relied on the constancy of the trade winds")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun inconstancy

2 senses of inconstancy

Sense 1
faithlessness, falseness, fickleness, inconstancy -- (unfaithfulness by virtue of being unreliable or treacherous)
       => infidelity, unfaithfulness -- (the quality of being unfaithful)

Sense 2
inconstancy, changefulness -- (the quality of being changeable and variable)
       => changeableness, changeability -- (the quality of being changeable; having a marked tendency to change; "the changeableness of the weather")