The Eagles Rescue the Company is the climactic aerial intervention in which the Lord of the Eagles and his flock sweep down from the Misty Mountains to snatch Gandalf, the dwarves, and Bilbo Baggins from the encircling goblins and wolves, carrying them to safety on the Great Shelf and ending the immediate threat of death by fire or fang.

Elrond reads the moon-letters on Thror's Map, revealing the secret of how to open the hidden door to the Lonely Mountain, a crucial piece of information that guides the dwarves' quest.

Gandalf's Fire-Cones Attack is a pivotal defensive action during the company's encirclement by Wargs and goblins in the forest east of the Misty Mountains, where the wizard uses enchanted pine-cones to create a diversion and buy time until the Eagles arrive.

The goblins capture the dwarves and Bilbo after they take shelter in a cave during a thunderstorm in the Misty Mountains, dragging them to Goblin-town where the Great Goblin interrogates them, until Gandalf kills the Great Goblin and leads the escape.

The Eagles' Arrival is the climactic turning point of the Battle of Five Armies, when the Great Eagles of the Misty Mountains descend upon the goblin host, turning the tide of battle and enabling the allied forces of Elves, Men, and Dwarves to achieve victory.

Bard is the grim-voiced bowman of Lake-town who slays the dragon Smaug, becomes the heir of Girion of Dale, and emerges as a leader who negotiates with Thorin Oakenshield and helps forge a new peace among men, elves, and dwarves after the Battle of Five Armies.

Bombur is one of the thirteen dwarves of Thorin and Company, notable for his immense size and weight, his constant hunger and love of food, and his tendency to fall into enchanted sleeps. Though often a source of comic relief and a burden to his companions, he survives the entire quest and remains with Dain in the Lonely Mountain after the Battle of Five Armies.

Bullroarer Took is a legendary hobbit ancestor of Bilbo Baggins, celebrated for his immense size, his single-handed victory in the Battle of the Green Fields, and his reputed invention of the game of Golf, whose martial exploits serve as a benchmark of Tookish ferocity and a source of inspiration for Bilbo's own unexpected courage.

Dain, also known as Dain Ironfoot, is the Lord of the Iron Hills and a cousin of Thorin Oakenshield who leads a relief force of over five hundred dwarves to the Lonely Mountain, ultimately becoming King under the Mountain after the Battle of Five Armies.

Dori is one of the thirteen dwarves of Thorin and Company, a member of the expedition to reclaim the Lonely Mountain from the dragon Smaug. He is notable for his role as a carrier of Bilbo Baggins during the escape from the goblin tunnels, his grumbling but decent nature, and his presence throughout the quest's major events.

Elrond is the wise and noble master of the Last Homely House in Rivendell, an elf-friend and chief of those with both elven and heroic ancestry, who provides crucial aid to Thorin's company by identifying their ancient swords, reading the moon-letters on Thror's Map, and offering rest and counsel before their perilous journey through the Misty Mountains.

Golfimbul is the goblin king of Mount Gram whose death at the hands of Bullroarer Took in the Battle of the Green Fields is a legendary event in hobbit history, invoked to illustrate the Took family's capacity for unexpected ferocity and to foreshadow Bilbo Baggins's own hidden courage.

Kili is a young dwarf of Thorin Oakenshield's company, notable for his sharp eyes, youthful energy, and close bond with his brother Fili. He plays a key role in the quest to reclaim the Lonely Mountain, participating in scouting, combat, and the final battle.

Old Took, the head of the Took clan and grandfather of Bilbo Baggins, is a legendary figure in Hobbiton whose adventurous reputation and connection to the wizard Gandalf set the stage for Bilbo's own unexpected journey, representing the wild, Tookish heritage that contrasts with the respectable Baggins side.

Ori is one of the thirteen dwarves of Thorin and Company who journey to reclaim the Lonely Mountain from the dragon Smaug. Though a minor figure in the adventure, he is consistently present as a member of the company, participating in its trials from the Unexpected Party at Bag-End through the Battle of Five Armies, and he remains in the Mountain with Dain after the quest's conclusion.

Radagast is a wizard mentioned briefly in The Hobbit, known as a cousin of Gandalf and a friend of Beorn, who lives near the southern borders of Mirkwood and is associated with the natural world.

Roäc is the ancient, blind chief of the ravens of the Lonely Mountain who brings Thorin Oakenshield the news of Smaug's death and warns of the approaching armies of Elves and Lake-men, acting as a pivotal messenger who shifts the dwarves' hope into a desperate siege.

The Master of Lake-town is the pragmatic, self-serving elected leader of Esgaroth (Lake-town) who initially welcomes Thorin Oakenshield and his company but later turns against them after the dragon Smaug's attack, embodying the conflict between mercantile self-interest and heroic leadership.

Thrain, son of Thror and father of Thorin Oakenshield, is a pivotal figure in the backstory of The Hobbit, a dwarf-king whose disappearance and imprisonment by the Necromancer set the quest for the Lonely Mountain in motion and whose legacy of loss and treasure haunts the entire narrative.

Thror was the King under the Mountain, the grandfather of Thorin Oakenshield, whose reign ended in ruin when the dragon Smaug destroyed his kingdom and seized the vast treasure of the dwarves. His legacy—the map, the key, and the Arkenstone—drives the entire quest of The Hobbit, and his death in the mines of Moria sets in motion the chain of events that leads to the recovery of the Lonely Mountain.

Adventure is the central concept and driving force of The Hobbit, representing both the external journey of Thorin's Company to reclaim the Lonely Mountain and the internal transformation of Bilbo Baggins from a comfort-loving hobbit into a resourceful and courageous figure. The narrative explicitly frames itself as a story of how a Baggins had an adventure, and the concept is explored through its disruptive, dangerous, and ultimately transformative nature, contrasting sharply with the respectable, adventure-free life of the Shire.

The Baggins side is the cautious, comfort-loving, and respectable half of Bilbo Baggins's personality, inherited from his father Bungo Baggins, which throughout the adventure constantly pulls him toward home, safety, and conventional hobbit values, and ultimately reasserts itself after his return to Bag-End.

The Heart of the Mountain, also known as the Arkenstone, is a legendary gem of immense beauty and value, discovered by the dwarves beneath the roots of the Lonely Mountain. It becomes the central object of desire and conflict in the latter part of the quest, symbolizing the dwarves' heritage and the corrupting power of treasure.

The New Peace is the restored order and prosperity that follows the destruction of Smaug, the defeat of the goblin and Warg armies in the Battle of Five Armies, and the reconciliation among dwarves, men, and elves. It marks the end of the Desolation of the Dragon and the beginning of a renewed era for the lands around the Lonely Mountain, Mirkwood, and the Misty Mountains, transforming the Wild into a safer, more settled region.

The Quest is the central organizing journey of The Hobbit, a perilous expedition undertaken by Thorin Oakenshield and his company of dwarves, with the reluctant hobbit Bilbo Baggins as their burglar, to reclaim the lost treasure of the dwarves from the dragon Smaug beneath the Lonely Mountain. It is the narrative engine that drives the entire plot, transforming Bilbo from a comfort-loving homebody into a resourceful adventurer and reshaping the political landscape of the Wild.

Ravens are intelligent, long-lived birds that serve as messengers and allies to the dwarves of the Lonely Mountain, particularly the ancient raven Roäc, who brings crucial news of Smaug's death and warns of approaching armies.

The Wild is the vast, untamed region beyond the borders of the Shire, a realm of increasing danger, ancient ruins, and lawless lands that the dwarves and Bilbo must cross to reach the Lonely Mountain. It represents the threshold between the comfortable, civilized world of the hobbits and the perilous, unknown East, and its crossing marks the true beginning of the adventure.

Bears in The Hobbit are not a single species but a category that includes the skin-changer Beorn, who can transform between human and bear forms, and the wild bears that dance around Beorn's house at night, serving as a protective force and a sign of his dual nature.

Ravens are intelligent, long-lived birds that once maintained a close friendship with the dwarves of the Lonely Mountain, serving as secret messengers and bearers of news. In the story, the aged raven Roäc, son of Carc, brings Thorin Oakenshield the crucial tidings of Smaug's death and warns of the approaching armies of Elves and Lake-men, thereby shaping the final phase of the quest.

Wargs are the evil wolves that live over the Edge of the Wild, often allied with goblins in wicked deeds, and they serve as a recurring threat to Thorin and Company during their journey through the Misty Mountains and beyond.