What is a synonym for time?

There isn't one perfect synonym for "time," as the word has many different nuances. Here are some options, depending on the context:

General:

* Duration

* Period

* Epoch

* Era

* Span

Passage of time:

* Flow

* Flux

* Progression

* Succession

* Lapse

Specific points in time:

* Moment

* Instant

* Hour

* Day

* Year

Time as a resource:

* Schedule

* Deadline

* Clock

Ultimately, the best synonym will depend on the specific meaning you want to convey.