What is another word for enternity?

There isn't a perfect synonym for "eternity," as it implies an infinite and unending period of time. However, depending on the context, you might use words like:

* Forever: This is the most common synonym, but it can also be used in a more informal context.

* Perpetuity: This implies a state of lasting forever, often in legal or financial contexts.

* Timeless: This emphasizes the lack of beginning or end, suggesting something that exists beyond time.

* Immortality: This refers to lasting forever, specifically in the context of life or existence.

* Everlasting: Similar to "forever," but can be used to emphasize the duration of something.

* Infinite: This emphasizes the boundless and limitless nature of eternity.

The best synonym for "eternity" will depend on the specific meaning you want to convey.