Akademik

permanence
noun
the property of being able to exist for an indefinite duration (Freq. 1)
Syn: ↑permanency
Ant: ↑impermanence
Derivationally related forms: ↑permanent (for: ↑permanency), ↑permanent
Hypernyms: ↑duration, ↑length
Hyponyms:
perpetuity, ↑sempiternity, ↑lastingness, ↑durability, ↑enduringness, ↑strength, ↑imperishability, ↑imperishableness, ↑imperishingness, ↑perdurability, ↑immortality
Attrubites: ↑permanent, ↑lasting, ↑impermanent, ↑temporary

Useful english dictionary. 2012.