Most hollering can be replaced with several different synonyms, depending on the context and type of hollering being referred to. Some possible options include the words most yelling, most shouting, most screaming, most bellowing, and most vociferous. Each of these synonyms has its unique connotations and can also be modified by adjectives to convey different nuances. For example, most yelling could be described as angry or frantic, while most shouting might imply more assertiveness or urgency. Ultimately, the best synonym for most hollering depends on the intended tone and meaning of the sentence, as well as the writer's personal style and preferences.