Add to Dictionary

Optionally add words to the dictionary, to be accepted as valid words in the spell checker. For example, you may plan on using proper names, locations, etc. in the puzzles, which may not be included in the dictionary. Adding these words to the dictionary will prevent the spell checker from stopping each time one of these words is found and requesting that you verify the spelling.

Selecting this option presents a window that lists all words previously entered as valid. Add or remove words from this list as needed. 

Crossword Construction Kit window > Options > Add to Dictionary