A family of Microsoft word processing software products for creating web, email, and print documents.
Instead of using double spacing, set the line spacing to Exactly some amount. If you're using (as it appears) the ordinary 12-point Times New Roman, try using Exactly 24 points. This is actually a little less than double spacing, which to me always looks a little too spacey. Exactly 24 points also gives you exactly three lines per inch, the same as double spacing on a typewriter.
Note that by default, multiple spacing (including double) adds the space below the text baseline, whereas Exactly spacing adds it above, which may cause issues with headings (also, this space isn't suppressed at the tops of pages), but you can change this by enabling the Compatibility Option "Don't center 'exact line height' lines" (which is a little misleading since Exactly spacing isn't centered to begin with).