Synonyms for «serious threat»

significant severe real grave huge threatening dangerous deep great potential deadly extreme health major big security considerable national heavy safety medical high critical public substantial much imminent massive strong financial legal possible acute actual negative profound economic physical criminal tremendous terrible mortal genuine special true permanent grievous personal urgent

danger risk menace warning harm attack seriousness challenge concern hazard impact damage issues problem terrorism crisis scare life peril consequences situation death worry future war injury trouble emergency matter conditions possibility effects behavior crime kind vulnerability implications face fear destruction look illness attention jeopardy amount violence purpose fire money