Desperate, breakneck, dodgy, and daredevil are another word for dangerous. Harmless and safe are the opposites of dangerous. On this page, find 36 synonyms for dangerous, parts of speech, and examples of dangerous sentences.
1. menacing
2. hazardous
Driving recklessly is extremely dangerous.
That animal looks very dangerous.
Climbing without gear is dangerous.
Smoking is dangerous to health.