This page shows a list of consecutive quadruplets drawn in Powerball, ordered by frequency.
There is no difference between Goblins and Orcs as far as being different species. They are basically the same. If I had to name one difference it would be that Goblins are a type of Orc that has developed more to tunnels and caves, whereas Orcs I think of more patrolling in open spaces, such as the plains of Gorgoroth.
In Morgoth's Ring, Tolkien states that Saruman did interbreed orcs and men, resulting in Man-orcs large and cunning, and Orc-men treacherous and vile.. However, the relationship of the Uruk-hai, as well as half-orcs and goblin-men, to these creatures is not made explicit.