Surely the Abdullah Yusuf Ali translation is in English language that we are using here. HQ 13:13 Lightening and thunder come together thus a translator might use either of them. When one is curious about the exact word used in Arabic then it will be better to spend some time on Arabic itself. My personal experience is that any such effort in trying to fathom the original words of another language pays handsomely in terms of insight. To top it all here we are trying to cling to the message of our Lord Most High.