Antonyms for the word "impermanences" mainly relate to the concept of something being permanent or enduring. Synonyms for permanence include stability, durability, longevity, and permanency. In contrast, the antonyms for impermanences include imperishability, perpetuity, fixity, and steadfastness. These words indicate a state of being permanent or unchanging, which is the opposite of the notion of impermanence. When something is impermanent, it is fleeting and transient, while the antonyms suggest something that is lasting and steadfast. In considering these opposing concepts, it's clear that their meaning lies at opposite ends of a spectrum - with impermanence existing at one extreme, and permanence at the other.