Antonyms for Inclusion Body Myositides are exclusion, omission, and rejection. Exclusion refers to the act of keeping something or someone out of a group or place. Omission, on the other hand, means leaving something out intentionally or unintentionally. Rejection signifies the act of refusing or denying something or someone. As antonyms for Inclusion Body Myositides, these words help bring out the opposite meaning of the term. While Inclusion Body Myositides is a medical condition characterized by muscle weakness and inflammation, exclusion, omission, and rejection signify the act of excluding, leaving out, or denying someone or something.