The phrase "phonies up" is typically used to describe something that has been falsified or manipulated. This can include data, evidence, or even stories. There are various other synonyms that can be used in place of this phrase. For instance, words like "fabricate," "forge," "manipulate," and "falsify" can all be used in similar contexts. Other options include "contrive," "cook up," "doctor," and "maneuver." Each of these words has a slightly different connotation, but all convey the idea that something has been purposely altered or presented in a misleading way. Using these synonyms can help writers add variety to their language and more accurately convey their intended meaning.