The word "discommender" refers to someone who advises against something or someone. There are several synonyms that can be used in place of this word, including negative reviewer, dissuader, naysayer, detractor, and cynic. These words all carry the same sense of skepticism or doubt about a particular subject, and can be used interchangeably in many cases. Other synonyms for discommender might include critic, faultfinder, skeptic, or objector. Ultimately, the choice of synonym will depend on the context in which it is being used, and the specific connotations or shades of meaning that are desired.