A family of Microsoft word processing software products for creating web, email, and print documents.
The paragraph at the end of which you have pressed Enter probably has some Spacing After. This is true for the Normal style in recent versions of Word:
Set the After spacing to 0 pt (and choose Single spacing instead of 1.08 if desired)--not just for the current paragraph but by modifying the style. If you want this to be the default for new documents, select that radio button.
A shortcut way to do this is to select the Manage Styles button in the Styles pane (third from the left at the bottom of the pane), choose the Set Defaults tab, and change the paragraph spacing there, selecting the radio button for "New documents based on this template."