The phrase "more fifty fifty" can be replaced by several different synonyms that convey a similar meaning. These include phrases such as "equally uncertain" or "half and half." Other options might include "split down the middle," "equal chances," or "even odds." Depending on the context and tone of the statement in question, other potential synonyms might include "fairly balanced," "divided evenly," or "equally probable." Ultimately, the choice of synonym will depend on the specific nuances that the speaker or writer is trying to convey with their words.