https://en.wikipedia.org/wiki/Devon_Great_Consols
Wheal is a mine complex.
Wheel is a wheel ............. of course.

Weal is a wound.
We'll is short for "we will".
Are there any more?
Next, can anyone write a single sentence including them all?

Don’t they parade them round your way in some sort of pagan-inspired folk dance?I'll get off my hobby-horse now!)
Wee'll work for invisible writing.