Eternalness refers to something that is timeless, lasting, never-ending, and infinite. There are several synonyms for the word eternalness, including permanence, immutability, infinity, perpetuity, ceaselessness, and endlessness. Permanence refers to something that exists permanently or for a very long time. Immutability implies that something is unchanging and cannot be altered or reversed. Infinity connotes a boundless or limitless quality. Perpetuity refers to an endless duration that will never come to an end. Ceaselessness relates to something that never stops, while endlessness refers to a state of existent without an end. All these synonyms describe the concept of eternalness in different ways.