Polymerous is an adjective used to describe a structure that has many similar parts or is composed of many units. There are several synonyms for the word polymerous that can be used depending on the context and meaning of the sentence. One synonym is "multimeric," which refers to a molecule or structure composed of many smaller units. Another synonym is "multiparous," which describes an organism that gives birth to many offspring. "Polymorphic" is another synonym that is used to describe a structure that can take on many different forms or shapes. Some other synonyms for polymerous include "multitudinous," "manifold," and "diverse." These synonyms can be used interchangeably to add variety and clarity to a sentence.