An added clause is an important component of any well-written sentence. It provides additional information to the main clause and helps to give context to the sentence as a whole. There are several synonyms for the term "added clause", including subordinate clause, dependent clause, and relative clause. These terms all refer to a clause that cannot stand alone as a complete sentence and instead relies on another clause for context. Other synonyms for the term may include adjunct, subordinate phrase, and modifying phrase. Regardless of the term used, added clauses are a necessary and vital part of clear and concise writing.