Help with Microsoft Office

I have been using Office on my mac, (iMac late 2012), with a 365 subscription with no problems for a long time now. However, recently when I try to open any of the office suite it says the application quit unexpectedly before the app even visibly opens. The only exception to this is outlook, (I'm not using it was just trying to see if the problem was replicated across the whole suite), when trying to open outlook nothing happens at all.

I have tried unlinking my iMac from 365, deleting and reinstalling office which worked until i quit Word for the first time, the next time I tried opening any of the apps it would not work again. Has anyone got any ideas? Any help would be much appreciated as it is making university life quite difficult at the moment.