He revealed the head of the goblin and the pelt of the Warg.
Beorn had been verifying the story he had been told. After questioning the goblin and warg he killed them. The Goblin's head was mounted on the wall and the warg's skin was nailed to a tree.
Beorn revealed the head of the goblin stuck outside the gate while the skin of the wolf was nailed to a tree just beyond
Beorn had beheaded the goblin and placed it on a pole either outside his own home or somewhere in the forest, and beorn also skinned the wolf and nailed the skin/fur to a tree
A goblin's head that was stuck outside the gate and the skin of a warg nailed to a tree.
"The Christmas Goblin" is a children's book that tells the story of a mischievous goblin who tries to sabotage Christmas but ultimately learns the true meaning of the holiday. Through his adventures, he discovers the joy of giving and the importance of spreading cheer and goodwill during the festive season.
Those would be orcs. They are a sort of large goblin. Both Bilbo and Frodo were captured by orcs at some point in their adventures.
He verified that the story that Gandalf and the others told him was true. He captured a goblin and a warg and killed them.
They were killed by Beorn. Beorn was investigating the truth behind Gandalf's story of the party's flight from the goblins and captured a wolf and goblin near the circle of trees where the party hid from the wargs. Beorn is described as having interrogated the wolf and goblin and the clear implication is that he killed them afterwards and kept their heads as trophies or perhaps warnings.
Resources say that it was named "Goblin" for it's resemblance to a Goblin.
a language in the goblin tongue
goblin
{| |- | Beorn was off checking up on the story that Gandalf and the dwarves had told him. He returned and told them that he had confirmed the story. Beorn captured a warg and a goblin and after getting information from them he killed them. The warg's skin and the goblin's were mounted on the wall. |}