In Word, goto Tools > Options and click the Spelling & Grammar tab.
Find the button for "Custom Dictionaries", and click. In the next dialogue window, highlight "Custom.Dic", and click "Modify".
You can add or delete entries here.
I hope this helps.
In Microsoft WORD program, if one inadvertently enters a word, which is actually incorrectly spelt, when the spell checker offers the option to ?ADD? how do you access all the words in the spellchecker dictionary to delete the word!