Trematode worm is a term that is commonly used to describe flatworms that are parasitic in nature. However, there are several other synonyms that can be used for the same term. Schistosome worm is another name for the trematode worm, which is a common parasite in humans and animals. Another synonym for trematode worm is fluke, which is often used to describe the parasitic flatworms found in the liver, lungs, and intestines of animals. Some people may also refer to trematode worms as liver flukes, lung flukes, or intestinal flukes, depending on where the parasite is found in the host's body.