"Have say" is a commonly used expression that refers to having the ability to express one's opinion on a certain matter. However, there are numerous synonyms that can be used in place of the phrase. Some alternatives include "voice", "state", "declare", "pronounce", "assert", "maintain", "express", "opine", "proclaim", and "enunciate". Each of these words conveys the same notion of expressing one's perspective on a topic or issue. By using different synonyms for "have say," writers and speakers can add variety and depth to their language and make their message more impactful.