General Concepts:
* Time: This is the most straightforward option, as it encompasses both past, present, and future.
* History: While primarily focused on the past, history also includes future possibilities and predictions based on past events.
* Eternity: This refers to an infinite duration, encompassing both the past and future.
More Specific Concepts:
* Chronology: This refers to the order of events in time, encompassing both past and future.
* Timeline: A visual representation of events in time, showing both past and future.
* Fate: This refers to a predetermined course of events, implying a pre-determined future based on the past.
* Destiny: Similar to fate, but often implying a more personal and individual future based on past choices.
Figurative Language:
* The Continuum: This refers to the continuous flow of time, encompassing both past and future.
* The River of Time: This metaphor describes the constant flow of time, with the past flowing into the future.
Ultimately, the best word to use depends on the specific context and the desired meaning.