As you would expect, the "spell" utility comes with several useful options. The more common ones are listed below
|-b||Uses British spellings|
|-v||Shows words not literally in the dictionary as well as a list of possible correct spellings|
|-x||Displays possible word stems for each word checked|
|+user_dictionary_file||Defines the location of a user dictionary file to supplement the UNIX dictionary|
The most important option of course is the user defined dictionary file. Most likely, you will want to create your own dictionary with your own word list. This file should simply contain a list of words (one word per line). If spell does not find the word in the UNIX dictionary, it will look at your dictionary file as well. Thus, in the next example, you see that though the UNIX dictionary does not recognize certain HTML commands, "spell" accepts them because they are defined in my own dictionary.