 When users are unable to find a word in a dictionary, it is usually due to the constraint of searching alphabetically by common and well-known headwords and the use of a thesaurus eliminates this issue by allowing users to search for a word through another word based on concept.Foreign language learners can make use of thesaurus to find near synonyms of a word to expand their vocabulary skills and add variety to their writing.Many word processors are equipped with a basic function of thesaurus, allowing learners to change a word to another similar word with ease.