What's the difference between a goblin and a hobgoblin?

While a goblin is often portrayed in folklore as a grotesque, evil, and malicious creature, a hobgoblin tends to traffic more in mischief than malice. (The character Puck in Shakespeare's A Midsummer Night's Dream might be regarded as a hobgoblin.) First appearing in English in the early 16th century, hobgoblin combined hob, a word meaning "sprite" or "elf" that derived from Hobbe, a nickname for Robert, with goblin a word ultimately from the Greek word kobalos, meaning "rogue." American writer Ralph Waldo Emerson famously applied the word's extended sense in his essay Self-Reliance: "A foolish consistency is the hobgoblin of little minds, adored by little statesmen and philosophers and divines."