Coccobacillus is a type of bacteria that has a shape that is somewhere between a sphere (a coccus) and a rod (a bacillus). If you are looking for synonyms for coccobacillus, you could use the words bacillo-coccus, cocco-bacillus, or ovoid rod. Other possible synonyms might include oval bacillus, rod-shaped coccus, or short rod. While the term coccobacillus is specific to a particular type of bacteria, these synonyms can be used to describe similar types of bacteria with similar shapes. If you are a biology student or researcher, it is important to be familiar with these synonyms in order to communicate accurately about bacterial morphology.