orcs and goblins- what's the difference???

[deal_with_it]

Originally Posted by Thalion

Since all Orcs/Goblins are perversions of Elves by Morgoth for the sole purpose of doing his bidding in mockery of Elves, I don't see how Orcs/Goblins would have come to NOT listen to their master, as we have no evidence throughout any of the works that this would have occured

What was the Great Goblin that recognized Orcrist and Glamdring? Thats as about as close as I saw in his works to a Goblin (orc) king, other than Bolg who led the Goblin Army in the Battle of Five Armies, but Bolg was just the leader (or the strongest goblin), not necessarily a king. Is that right?