Final answer:
A synonym for suppressing rumors is concealing them, or actively trying to hide or keep them secret.
Step-by-step explanation:
A synonym for "suppress" in this context would be conceal. When someone tries to suppress rumors, they are attempting to hide or keep them secret. In this case, the word "suppress" means to prevent the rumors from spreading or becoming widely known. Another synonym could be "ignore" but it does not convey the same level of intention to actively hide the rumors.