Synonyms for prepared in Free Thesaurus. to make competent (as by training, skill, or ability) for a particular office or function All is prepared—the table and the feast— With due appurtenance of clothes and cushions.I don't think it will, mind, but it's best to be prepared, so give me the key. Prepared: being in a state of fitness for some experience or action. to work out the details of (something) in advance Antonyms for prepared. Another word for prepare. Prepared synonyms.