When we say something is "eternally the same," we imply that it has remained unchanged for an extended period. Some synonyms for this phrase include "unvarying," "unchanging," "perpetual," "constant," and "immutable." These words convey the idea of sameness, suggesting that something has always been and will always be the same. Other synonyms include "timeless," "unchangeable," "invariable," and "steadfast." These words signify something that does not alter or undergo any transformative process, and they indicate a sense of continuity and reliability. Overall, there are numerous synonyms for "eternally the same," and each of them captures a slightly different nuance of this concept.