danger (part of speech: noun)
warning (part of speech: noun)
threat (part of speech: noun)
- That threat would make him angry, he knew, and he might say something that would get him in real trouble. - "A World by the Tale", Gordon Randall Garrett.
- Will he stay in spite of my threat? - "The Puppet Crown", Harold MacGrath.
- I refused at first, but he forced me to consent by a threat which was hardly meant seriously. - "The Sign of Flame", E. Werner.