The word "Alterant" generally means something that alters or changes. If you are looking for synonyms for the word alterant, there are many options available depending on the context. Some of the most common synonyms include modifiers, transformers, adjusters, converters, and controllers. Other alternatives include modifiers, regulators, adaptors, and transformers. These words reflect the same basic idea as alterant, but they may have slightly different connotations or implications depending on the context. Ultimately, the choice of synonym will depend on the specific meaning and usage of the word in the sentence or phrase.