A family of Microsoft word processing software products for creating web, email, and print documents.
Word hasn't a built-in feature that "lines up" text the way you describe it.
What you can do is set a fixed value for Line Spacing (choose "Exactly" and type a value in points) in the Paragraph dialog box for all text paragraphs (including headings). Any Spacing Before or Spacing After must be set to an integer multiple of the chosen value for Line Spacing.
Note that this may be difficult to maintain, and you may not find it worth the effort.