* Suppressed: This implies actively hiding or preventing the spread of information.
* Withheld: This suggests intentionally keeping something from being released.
* Concealed: This emphasizes the act of hiding something.
* Silenced: This refers to stopping something from being spoken or communicated.
* Withdrawn: This implies the removal of something that was previously made public.
* Rejected: This signifies the refusal to accept or endorse something.
The best antonym will depend on the specific situation and the meaning you want to convey.