Can you identify this tree?

[hoochfisher]

I've got two of these trees on my property, and myself and no one I know can identify them. I've googled and still can't find a match.

Trees are 20-25' tall, have big broad leaves 8-10" wide, and has some kind of nut, but only at the top 10' or so. The nuts are bright green hulled, and are extremely hard. I tried grating one Like a nutmeg nut and the rasp barely even scratched the nut. Here's the best pics I could get of one:

 

[BIKER13]

Butternut oak I think it is called

 

[SSJones]

 

[BIKER13]

^^^^^ I think he has it

 

[kayaker]

Extremely light wood. Almost like balsa.
Grows extremely fast.

 

[hoochfisher]

View attachment 4794839

This is close, but not it upon researching it further. Searching shows the seed/nut pods of the princess tree split and contain smaller particles, like the pic below. The trees have, have a large, very hard nut/seed in them.

View attachment 4794839

 

[hoochfisher]

This is the nut/seed pod from my tree split open. The nut under my thumb is extremely hard, and solid.