General:
* All: This is the most common and straightforward synonym.
* Each and every: Emphasizes comprehensiveness and individual items.
* Whole: Refers to the complete entity.
* Entire: Similar to "whole" but often implies a complete and unbroken unit.
* Total: Emphasizes the sum of all parts.
Specific:
* All things: Can be used when referring to all objects or concepts.
* The universe: Broadest possible meaning, encompassing everything.
* All creation: Refers to everything that exists.
* Everything imaginable: Highlights the vast scope of the concept.
* All that is: A philosophical phrase, referring to the totality of existence.
Informal:
* The whole shebang: Used colloquially to express the entirety of something.
* Everything under the sun: A colloquial expression for a vast range of things.
* All the bells and whistles: Refers to all the features or aspects of something.
Ultimately, the best synonym for "everything" depends on the specific context and the nuance you want to convey.