What would you think is the difference between BULIMIA and LIMOSIS?

As ASp has said, bulimia is characterized by "eating and purging", presumably to maintain a lean figure [which is never lean enough, of course].

Limosis is simply an morbid desire to eat, presumably without the morbid desire to lose the weight.

If I am right about this, those suffering from Limosis would be overweight, those from Bulimia would be gaunt.