As a proper noun ollie
is a diminutive of the male given name oliver.
As a noun collie is
any of various breeds of dog originating in scotland and england as sheepdogs.
Other Comparisons: What's the difference?
(snowboarding, skateboarding) a manoeuvre wherein one catches air by lifting the front and tail ends off the ground at the same time; a hop.
Any of various breeds of dog originating in Scotland and England as sheepdogs
* collie eye anomaly