The phrase "voice doom" refers to the act of predicting a negative future outcome. Synonyms for this expression include phrases such as "foretell disaster," "predict gloom," or "prophecy downfall." When someone voices doom, they are expressing a pessimistic outlook for the future, often citing evidence of past failures or current challenges as indicators of what is to come. Other synonyms for "voice doom" might include terms like "express despair," "anticipate catastrophe," or "project failure." Regardless of the wording used, the underlying sentiment is one of negativity and concern for what might lie ahead.