Antonyms of noun unstableness

1 sense of unstableness

Sense 1
instability, unstableness -- (the quality or attribute of being unstable and irresolute)
       Antonym of stableness (Sense 1)
      => stability, stableness -- (the quality or attribute of being firm and steadfast)

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

1 sense of unstableness

Sense 1
instability, unstableness -- (the quality or attribute of being unstable and irresolute)
       => unsteadiness -- (the quality of being unsteady--varying and unpredictable)