Synonyms for dangerous

Adjective

1. dangerous (vs. safe), unsafe, breakneck, chancy, chanceful, dicey, dodgy, desperate, harmful, hazardous, risky, venturesome, venturous, insidious, mordacious, on the hook(predicate), parlous, perilous, precarious, touch-and-go, self-destructive, suicidal, treacherous, unreliable, insecure#2, unsafe, vulnerable

usage: involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions"

2. dangerous, grave, grievous, serious, severe, life-threatening, critical (vs. noncritical)

usage: causing fear or anxiety by threatening great harm; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease"