The phrase "to excessive degree" implies that something is done or taken too far, beyond a reasonable limit. There are several synonyms for this phrase, including "extremely," "exorbitantly," "outrageously," "overly," "immoderately," "unreasonably," and "intensely." Each of these words conveys the same message that something has gone beyond what is considered normal or acceptable. Additionally, words like "over-the-top," "unbearable," "unmanageable," and "insufferable," can also be used to suggest that something is too much or beyond one's capacity to handle. When communicating with precision, using synonyms for "to excessive degree" can add clarity and emphasis to your message.