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Having said that, tile will stand up much better to the rigors of kitchen life than laminate will. Of course, you'd still need to level out the floor prior to tile as well.
But moisture is a big concern as it can get between the very tiny spaces between the boards and cause them to swell slightly. This causes the edge to lift and begin to cup. In fact even using the steam mops on them which appears to all the rage these days. The steam is forced between the wood
However all is not lost. You still can use wood floors, but you need to use real wood floors that have been properly placed down on a level sub floor and have been properly finished and sealed. Bit more money but you get a floor that will last a much longer time and feel much better under your feet.
The leveling depends on why it is so uneven. if the support structure is sound, then the minor fluctuations can be dealt with using a SLC - Self Leveling Compound
I saw a display in my local lumberyard with this. They had a quart mason jar of water epoxied to the sample at a joint. It has been there for years now and still has the same amt of water and no swelling or failure at the seam.