Edit: I specifically stated in my question that using \above is not an acceptable solution because of line-spacing issues. Nevertheless, this question has twice been marked as a potential duplicate of another Equation Editor accent-mark question where the solution was using \above.
This edit is simply to indicate in the body of the question that this is not a duplicate and that I needed specific, alternative solutions. I have since discovered a list of all Math AutoCorrect options in Word and have identified \rhvec as the solution. As such, I posted an answer to my own question but I can't accept it until after 48 hours. In the meantime, it would be nice to take the duplicate question tag off this question since it is not, in fact, a duplicate. I attempted to indicate this in comments in response to both assertions that it is a duplicate but the tag got applied nevertheless.
I preface this question by acknowledging that there is a similar question about adding an arrow by using v\vec which works well. However, I need to add a rightwards harpoon above a letter.
I'm using Microsoft Office 2013 I should note.
I have found that I can use v\above(\rightharpoonup) and that will put a rightwards harpoon up above my v, but it's got a big gap between the v and the harpoon. I want it to be a nice, small gap identical to when I use the gallery selection to go under "accents" and select "rightwards harpoon above".
I would also like to be able to add other accents, so a general reference would be very useful. For example, I'm curious to know where the person who answered the previous question got the \vec from. If there's a table of all such commands somewhere, I'd very much like to know about it.