The phrase "out up on" has various synonyms depending on the context and usage. "Out" can be replaced with words like "outside," "beyond," "away from," or "off." When referring to a location or position, "up" can be replaced with words like "high," "elevated," or "above." Similarly, "on" can be substituted with "onto," "over," "upon," or "across." These synonyms add variety and clarity to writing, making it more engaging and informative. Choosing the right synonym can enhance the meaning and tone of a sentence, therefore, it is always recommended to have a good knowledge of synonyms while writing or speaking.