I am looking at getting a new rear wheel for touring so it will have more spokes and be a bit more heavy duty for the job in hand. I was wondering what the different was between a hybrid and a road wheel was, both the wheels I have seen are 700c.
I was wondering would a hybrid wheel work on my road bike giving me more strength for the back wheel and better for touring?
No. Road bikes and Hybrid bikes have different dimensions for the axle length.
Road bikes use an Over Locknut Dimension of 130mm.
Hybrids use the MTB standard of 135mm.
Most touring bikes use 135 so this is the generally accepted standard for touring wheels that you buy ready-made.
You can convert a 135mm wheel to a 130mm frame buy removing 5mm of spacer and cutting/swapping the axle and quick-release skewer. You may have to adjust the spoke tension to centre the rim. Its possible but takes some expertise.
Any competent bike shop with a wheel-builder should be able to build up a 36-spoke road hub with a touring rim to fit a std road bike.
Note that many road bikes have tight clearance at the brakes and frame which may limit the tyre width and possibly the rim width. A general purpose rim such as Mavic Open Pro or Open Sport will be sufficient.