It's odd that Word works OK in Safe mode, but not in Normal mode with no Addins. It's possible you have a corrupt Normal template or BuildingBlocks template. If you look in the thread
https://www.msofficeforums.com/word/...locations.html, you'll see where these are usually found. Close Word, then Delete or rename the Normal.dotm and BuildingBlocks.dotx files. This should cause Word to create new ones when it restarts.