A "word string" is a sequence of words used together. Some synonyms for this term could include "word sequence," "phrase," "expression," "verbal construct," "sentential combination," or "lexical sequence." Each of these synonyms emphasizes the use of words in a specific way, whether they are used in a particular order, have a specific meaning, or represent a fixed set of words used together. Word strings play an important role in language and communication, as they help convey meaning and convey a particular idea to the listener or reader. Therefore, knowing different synonyms for "word string" can help us communicate more effectively in various contexts.