General synonyms:
* Exertion: This emphasizes the physical or mental strain involved.
* Endeavor: This implies a determined attempt to achieve something.
* Work: This is a more general term, but can be used as a synonym for effort.
* Strive: This suggests a strong effort to achieve something difficult.
* Attempt: This emphasizes the act of trying.
* Try: This is a simple and straightforward synonym for effort.
More specific synonyms:
* Labor: This emphasizes hard work.
* Toil: This implies strenuous effort.
* Hustle: This suggests energetic effort.
* Energy: This emphasizes the forcefulness of the effort.
* Industry: This implies diligence and persistent effort.
The best synonym for "effort" will depend on the specific context in which it is used.