The cause was easy enough to identify: Data parsed by Kuhls and her colleagues showed that drivers were speeding more, on highways and on surface streets, and plowing through intersections with an alarming frequency. Conversely, seatbelt use was down, resulting in thousands of injuries to unrestrained drivers and passengers. After a decade of steady decline, intoxicated-driving arrests had rebounded to near historic highs.
… The relationship between car size and injury rates is still being studied, but early research on the American appetite for horizon-blotting machinery points in precisely the direction you’d expect: The bigger the vehicle, the less visibility it affords, and the more destruction it can wreak.
They’re the same meaning just about exactly. Maybe lethal is a little more “fancy” if that makes sense. There’s a lot of pairs of words in English like that, where one synonym came from old germanic/norse languages and the other came from old french/latin languages.
That’s why wedding vows say “to have and to hold”, for example. More educated people back in the day would use “have” (from habere in latin) and more common people would use “hold” (idk exactly from where but i assume old german or something.) When there was a wedding they wanted everyone to understand what was being said.