The word "ogrer" is an uncommon noun that does not have any widely accepted antonyms. However, if we break down the word into its component parts, the prefix "ogre" means a large, menacing, and brute person or creature. So, antonyms for this prefix might include words like small, delicate, and gentle. On the other hand, the -er suffix denotes a person who does a particular job or who has a particular quality. Thus, antonyms for this suffix might include words like non-doer, inactive, and weak. However, there is no direct antonym for "ogrer," which is a rare word and may not appear in many dictionaries.