Synonyms for (adjective) life-threatening

Synonyms: dangerous, grave, grievous, life-threatening, serious, severe

Definition: causing fear or anxiety by threatening great harm

Usage: 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

Similar words: critical

Definition: being in or verging on a state of crisis or emergency

Usage: a critical shortage of food; a critical illness; an illness at the critical stage