"a fatal accident"
"a deadly enemy"
"mortal combat"
"a mortal illness"
"deadly poisons"
"lethal weapon"
"a lethal injection"
"venomous snakes"
"a virulent insect bite"
"the seven deadly sins"
"she was madly in love"
"deadly dull"
"deadly earnest"
"deucedly clever"
"insanely jealous"