Please Note: This article is written for users of the following Microsoft Word versions: 2007, 2010, 2013, 2016, 2019, and 2021. If you are using an earlier version (Word 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Word, click here: Ignoring Words Containing Numbers.
Written by Allen Wyatt (last updated January 28, 2025)
This tip applies to Word 2007, 2010, 2013, 2016, 2019, and 2021
Have you ever noticed that one of the side effects of our fast-paced world is the creation of new words? It seems that every day—particularly in the technological or medical fields—that new words are bursting forth on the scene. Some of these words are actually composed of letters and numbers together. For instance, b2b is an acronym (word?) meaning business-to-business.
Normally such words would be flagged by Word's spelling checker as being incorrect. If you create documents that contain quite a few words that are formed by mixing letters and numbers, you may want to instruct Word to ignore them. You can do so by following these steps:

Figure 1. The Proofing options of the Word Options dialog box.
WordTips is your source for cost-effective Microsoft Word training. (Microsoft Word is the most popular word processing software in the world.) This tip (6079) applies to Microsoft Word 2007, 2010, 2013, 2016, 2019, and 2021. You can find a version of this tip for the older menu interface of Word here: Ignoring Words Containing Numbers.
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