The file is a text only file. You can create a new one in any text editor, including Word, then rename it .dic. Then move the file to the required location.
Custom dic-
Editing Your Custom Dictionaries / Editing Custom Dictionaries
http://wordribbon.tips.net/T012196_Editing_Custom_Dictionaries.html
Custom dictionaries can be great, but they take quite a bit of time to create. Word provides a way you can edit your custom dictionaries, or you can simply edit one using a text editor. This tip shows how to make the changes.
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Backing Up Your Custom Dictionaries
https://wordribbon.tips.net/T013160_Backing_Up_Your_Custom_Dictionaries.html
When you work with the spelling checker quite a bit, you eventually end up with a sizeable custom dictionary. You might want to back up that dictionary for some reason, but not know where to find it. Here’s what you need to do.
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Dictionaries for Microsoft Word
http://word.tips.net/T000360_Dictionaries_for_Microsoft_Word.html
Word allows you to develop custom dictionaries or use custom dictionaries that have been developed by other people. Finding such dictionaries can be challenging at times, but this tip provides some suggestions on where you can find these helpful files.
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Dealing with a Full Custom Dictionary
http://wordribbon.tips.net/T006092_Dealing_with_a_Full_Custom_Dictionary.html
Does Word tell you that your custom dictionary is full? It might not actually be full, but even if it is you can add another custom dictionary to those that Word uses.
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