What tool would you use in a word-processing program to check for spelling mistakes?

The spell checker is a tool specifically designed to identify and correct spelling mistakes in a document. It works by comparing the words in the text against a comprehensive list of correctly spelled words. If it detects a word that is not found in this list, it highlights it and often suggests alternatives. This makes it an essential component of word-processing programs, helping users to ensure their documents are free from spelling errors, which enhances clarity and professionalism.

While a thesaurus can provide synonyms to improve word choice, it does not check for spelling. A dictionary provides definitions for words but is not integrated into word-processing software for spelling checks. Similarly, a grammar checker focuses on grammatical correctness, such as sentence structure and punctuation, rather than solely on spelling. Therefore, the spell checker is the most relevant tool for checking spelling mistakes in a word-processing application.