There are a few synonyms for the word "biflagellate", which refers to an organism that has two flagella. Some alternative terms include "dibothriotrichous", "amphitrichous", and "bipolar". These synonyms describe the same concept as "biflagellate", but with different linguistic roots and variations in meaning. For example, "dibothriotrichous" specifically refers to organisms with flagella at opposite ends of the body, while "amphitrichous" can refer to organisms with flagella at both ends or only one end of the body. These synonyms can be helpful in scientific writing or discussions where precise language and terminology are important.