set myList to {1, 3, 5, 7}
set myList_2 to {2, 4, 6, 8}
set newList to {}
repeat with n from 1 to (count of myList)
set end of newList to n & item n of myList_2
end repeat
newList --> {{1, 2}, {2, 4}, {3, 6}, {4, 8}}
set {l1, l2} to {{"1", "2", "3"}, {"4", "5", "6"}}
set newlist to {}
repeat with i from 1 to (count l1)
set end of newlist to (item i of l1) as text & " " & item i of l2
end repeat
newlist --> {"1 4", "2 5", "3 6"}