Geosynchronous
do not rotate in the same plane as the earth but will complete one full revolution in 24 hours.
Every 24 hours the satellite will appear in the same spot relative to the earth
Geostationary
orbits in the same plane as earth
Location relative to the earth does not change.
Objects that r similar size
They will pull on each other
If the masses of the two objects r greatly distorted
Gravity is perceived to be one way