Adjektiv
terrifying [ more terrifying ; most terrifying ]
horrible {feelings & emotions}, [ more horrible ; most horrible]
awful [ awfuller/more awful ; awfullest/most awful]
awesome [ more awesome ; most awesome ]
formidable [ more formidable ; most formidable]
nightmarish [ more nightmarish ; most nightmarish ]
dreadful [ more dreadful ; most dreadful]
fearful [ fearfuller ; fearfullest]
fearsome {feelings & emotions}
startling {feelings & emotions}, [ more startling ; most startling ]
thunderous [ more thunderous ; most thunderous ]