The word "holler out" refers to speaking or shouting loudly in order to attract attention or make a point. There are a number of other phrases and words that can be used as synonyms for this term, including "call out," "shout out," "yell out," "scream," "cry out," and "bellow." Each of these phrases can be used in different contexts depending on the situation and the speaker's intended tone and message. Whether you're trying to get someone's attention or express strong emotions, these synonyms can help you communicate your message effectively.