Metapod is a term typically used in the Pokemon universe, referring to a cocoon-like creature that evolves into the popular Pokemon Butterfree. However, when it comes to synonyms for this word, the options may seem limited. Some alternative terms that can be used include chrysalis, pupa, cocoon, and even exuviae. These words all refer to the stage of an insect's life cycle where it transforms from a larva or nymph into an adult. While these terms may not be as commonly associated with the Metapod in the game, they are still fitting descriptions for the transformation that occurs within the Pokemon universe as well as in the natural world.