Pluteus Magnus is a scientific term that refers to a particular species of mushroom. While there are no direct synonyms for this term, there are a few related words that may be useful in describing it. For example, you could use words like "large" or "magnificent" to convey the meaning of the term. Alternatively, you could use more general terms like "mushroom" or "fungus" to describe the Pluteus Magnus without getting into the specific details of its taxonomy and characteristics. Ultimately, the choice of words will depend on the context in which they are being used and the level of specificity required.