General:
* Represents
* Symbolizes
* Indicates
* Means
* Signifies
* Denotes
* Implies
* Refers to
* Is an abbreviation for (if referring to an acronym)
More specific:
* Embodies (if referring to a concept or ideal)
* Advocates for (if referring to a cause or belief)
* Defends (if referring to a principle)
The best synonym will depend on the specific meaning you want to convey.