A spelling-book is a tool used to improve one's ability to write and spell words correctly. However, there are several other terms that can be used interchangeably with spelling-book. These include word list, vocabulary book, dictionary, lexicon, glossary, and thesaurus. A word list is a collection of words that are to be learned by heart for spelling purposes. A vocabulary book, on the other hand, is a larger collection of words that are to be learned in order to improve one's vocabulary and language skills. A dictionary, lexicon, and glossary are reference books that provide definitions and meanings for words, while a thesaurus provides synonyms and antonyms for words. All these resources can be used to enhance and expand one's knowledge of the English language.