Order Sarcosporidia is a term used to describe a group of parasitic protozoa that infect various animals including humans. These organisms belong to the phylum Apicomplexa which is characterized by their complex life cycle. If you are looking for synonyms for this term, you might want to consider using the terms Sarcosporidiosis or Sarcosporidioses. These terms refer to the disease caused by members of this group, and are commonly used in scientific literature. Other synonyms that could be used include Sarcocystosis and Sarcosystosis, which also refer to the disease caused by Sarcosporidia. However, it is important to note that these terms may not be well known outside of scientific circles.