if list1, list2, list3, ... listN, are lists, then it is possible to use N variables and iterate over all the N lists at once, thus:
for item1, item2, ... itemN in list1, list2, ... listN do
<instructions using item1, item2, ...itemN >
endfor
The instructions will be obeyed N times, each time taking one item from
each list. If any lists are shorter than the shortest list, then their
trailing items will be ignored.
E.g.
vars item1, item2, item3;
for item1, item2, item3 in
[the every each all some],
[men pig cow cars],
[stank slept fell ate]
do
[^item1 ^item2 ^item3] =>
endfor;
** [the men stank]
** [every pig slept]
** [each cow fell]
** [all cars ate]