More ether can be substituted with a variety of synonyms depending on the context and intended meaning. Synonyms for more ether can include "added ether," "extra ether," "increased ether," "additional ether," "supplementary ether," "augmented ether," or "further ether." Each of these synonyms can be used to convey the idea of a greater quantity or quality of ether. Depending on the context, some synonyms may be more appropriate than others. For instance, "added ether" may be a good choice when discussing the incremental addition of ether to a solution, while "augmented ether" may be more suited to describing a significant increase in ether concentration.