The way to do this in Word is to insert a macrobutton field. This allows you to place text on the page which can be doubleclicked to run a macro. You can style the text as large as you like (as long as it fits on a single line) and even add a background shading. It is not the same as Excel but it is a reasonable facsimile
An example of the field code to run at macro by double clicking is
{macrobutton MacroName DoubleClick to run the MacroName macro}

Note that the curly brackets are inserted by pressing Ctrl-F9