Thalassa is ancient Greek for "sea" and has been widely used in various contexts. There are a multitude of synonyms for this word in different languages, some of which include "ocean," "seaway," "briny," "deep blue," "waters," and "marine." In nature, the sea encompasses 72% of the Earth, and the language captures the complexities and varying moods of the body of water that covers most of our planet. Synonyms are valuable tools in the pursuit of language, as they increase the number of precise words the writer can use to convey meaning. They help bring clarity to writing, which is why it's always worthwhile to build one's vocabulary.