([^\W\dA-Z && (I|X|L|V|\.)])\1{2}
works in http://regex101.com/r/xB5sT0/1
How to make it work except in \b(Fuss|Mass|Bloss|Gross)
cases?
All of the listed German words can be in the middle of the word as well, or start with small letters (fuss|mass|bloss|gross)
I do not want to match composita words like Fusssoldat, because I know everything is ok with them, because Fuss + soldat makes sense.