The word "amoeban" refers to characteristics or traits that resemble those of amoebas, a type of single-celled organism. Some synonyms for "amoeban" include ambiguous, indefinite, and shapeless. Other options include formless, vague, and unstructured. Additionally, the word nebulous, which means hazy or indistinct, could also be used as a synonym for "amoeban." These terms can be applied to a range of situations and contexts, such as describing a vague or shapeless idea or a nebulous, undefined concept. Overall, using synonyms for "amoeban" can help provide a clearer and more nuanced understanding of the attributes being described.