"As a deduction" is a common phrase used to indicate a conclusion drawn from a set of facts or evidence. However, it is important to have variation in language and communication. Therefore, some synonyms for "as a deduction" include "accordingly," "consequently," "ergo," "hence," "therefore," "thus," and "so." Each of these words suggests a logical consequence or conclusion based on evidence or information presented. Using different synonyms can add depth and nuance to your writing, making your message more clear and engaging for your reader. By utilizing a variety of synonyms, one can create a more compelling and well-rounded argument.