Manawydan is a Welsh word that is often translated to mean "ocean" or "sea," as it is derived from the name of a sea deity in Welsh mythology. However, there are several other synonyms that can be used to describe this word. Some of these include "maritime," "coastal," "seafaring," "aquatic," "nautical," "marine," "oceanic," and "seagoing." These words all share the common theme of relating to the sea or ocean in some way. So whether you're looking to describe a beach vacation, a love for sailing, or a fascination with marine life, there are plenty of synonyms to choose from when it comes to the word "manawydan".