Antonyms of noun impermanence

1 sense of impermanence

Sense 1
impermanence, impermanency -- (the property of not existing for indefinitely long durations)
       Antonym of permanence (Sense 1)
      => permanence, permanency -- (the property of being able to exist for an indefinite duration)

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

1 sense of impermanence

Sense 1
impermanence, impermanency -- (the property of not existing for indefinitely long durations)
       => duration, length -- (continuance in time; "the ceremony was of short duration"; "he complained about the length of time required")