Here's #1, using the KM Variable Array, which is a great feature (but not well documented -- I'll try to fix that).
I want to first highlight the part of the Action that uses a KM Variable as an array:
%Variable%Local__List2[Local__i]%
First, the "array" is actually a comma-deliminted list, like this:
Bird,Horse,Plant
which I built in the 3rd Action:

by replacing linefeeds with commas.
Each element of the array is separated by a comma.
But the hard part (actually just unclear part), is how to reference each element of the array. While the KM Wiki shows us:
%Variable%<VariableName>[3]%, where 3 is the index in this example.
it may not be clear exactly what is meant by "can be any Calculations."
Simply put, that means you can use another KM variable as the index, which did. I used "Local__i":
%Variable%Local__List2[Local__i]%
So, as we loop through the For Each loop, Local__i gets incremented by 1 each time.
Make sense? If not, please ask questions.
OK, enough documentation. Here's the macro:
##Macro Library Combine Two Lists Using KM Variable Array
####DOWNLOAD:
<a class="attachment" href="/uploads/default/original/2X/8/82c104ff9f760e7014bae463cba19f2427b4c9bd.kmmacros">Combine Two Lists Using KM Variable Array.kmmacros</a> (5.0 KB)
**Note: This Macro was uploaded in a DISABLED state. You must enable before it can be triggered.**
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<img src="/uploads/default/original/2X/4/4da37de29c0cd3e9fe26c24ac78464935fba70e3.png" width="459" height="997">
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### Footnote
One reason I prefer the AppleScript, is that I find Actions like this very hard to read:

Everything just runs together, and there are too many `%` symbols to sort out.
I would have preferred something like this:
`Local__Line + "=" + Local__List2[Local__i]`
IOW, Everything that is NOT in quotes is assumed to be a Variable or function.
But hey, that's probably the coder in me talking. Those of you who haven't coded may very well prefer it the way it is.
I'm not complaining, really, just explaining another reason why I prefer the AppleScript.
YMMV.
Good luck and enjoy whatever method/macro works best for you. :smile: