Here are some words that incorporate this root:
* Moron: A person of low intelligence, a fool.
* Moronic: Extremely stupid or foolish.
* Morose: Sullen and bad-tempered. (Though this word is unrelated to "moros" and comes from a different root.)
* Moratorium: A temporary suspension of activity. (This word is also unrelated to "moros" and has a different root.)
While "moros" itself isn't commonly used in English, it's a fascinating example of how Greek roots can be used to create new words.