[thomass]

even if you manage to do this there is a bigger problem: recompiling the doc over and over and over again will eat Kindle's battery.

Instead you may follow this: enter the correct form of words as notes, then look for a way (of course on a pc) to change this words according to your notes. for example: convert the doc to htmlz (ie one file html) then use a script to search on this file according to your MyClippings.txt. Or create a Calibre plugin ( like polish book,edit ToC) that could tweak your azw3 book directly according to your MyClippings.txt file. Or ...