Word stock refers to the collection of words that a person or language possesses or uses. There are a number of different synonyms for this term, including vocabulary, lexicon, word hoard, and terminus. All of these terms refer to the same basic idea - the collection of words that a person or language has at their disposal. Some people may also use the term "word bank" or "word repertoire" to refer to this concept. Whatever term is used, it is important to remember that the size and quality of a person's word stock can have a significant impact on their ability to communicate effectively.