There are several synonyms for the word "ameboid", which refers to the movement or shape of an organism resembling that of an amoeba. Some synonyms include "amoebic", "amorphous", "shapeless", "mutable", "flexible", and "plastic". Each of these words can be used to describe the characteristics of an organism that can change its shape and move in a flexible manner, much like an amoeba. The term "ameboid" can also be used to describe certain processes in science, such as the movement of cells or the spread of disease. By using these synonyms, one can add variety and precision to their writing or discussions on biology or other related topics.