When it comes to synonyms for "attenuable", there are a few options to choose from. One possibility is "reducible", which means that something can be decreased or made less severe. Another option is "mitigable", which indicates that a problem or situation can be relieved or eased. "Mollifiable" is another choice, which means that something can be pacified or appeased. "Weakenable" is a synonym that suggests something can be made less strong or effective. "Alleviable" is also an option, which means that something can be relieved or lessened. Whatever word you choose, these synonyms all convey the idea that something is able to be diminished or made less impactful.