General synonyms:
* Reveal
* Disclose
* Uncover
* Publish
* Expose
* Tell
* Break (as in "break a story")
* Leak (often implies a secret or unauthorized disclosure)
More formal synonyms:
* Communicate
* Impart
* Disseminate
More informal synonyms:
* Spill the beans
* Let the cat out of the bag
* Give away
The best synonym to use will depend on the specific situation and the desired tone.