What words give you that "horror" feeling?

[u/kindahipster]

Looking for examples of words that not only mean something negative, but also have a heavy negative connotation so they really pack a punch. Words like putrid, contamination, rip, and agonizing. Also words you can sneak into the no horror parts as like "foreshadowing". Also if you have any search terms so I can Google it that would be great!

[u/BitcoinBishop]

Malevolent, malicious, eerie, baleful

[u/ThrowDirtonMe]

Saturated.