Similarity	Harry Potter	Lord of the Rings
Evil sorceror referred to as "Dark Lord" who desires to regain physical shape	Voldemort	Sauron
Wise old mentor with a long gray beard and a wizard hat	Dumbledore	Gandalf
A birthday sets off events	Harry's 11th	Frodo's 33rd and Bilbo's 111th
Inherited invisibility device	Cloak	Ring (although the Ring takes you to a different 'world')
Dog named Fang	Owned by Hagrid	Owned by Farmer Maggot
Evil, creepy hooded creatures	Dementors	Nazgul
Deceased parents	Harry's parents were murdered	Frodo's parents drowned
Taken to live with uncle	Harry lives with his Uncle Vernon and Aunt Petunia	Frodo lives with his Uncle Bilbo (film version - second cousin once removed in the book)
Giant Spider	Aragog	Shelob
Bad guy with a "wormy" name	Peter Pettigrew (Wormtail)	Grima (Wormtongue)
Longbottom	Neville Longbottom who excels at Herbology	Tobold Hornblower from Longbottom who knows much about herbs and pipe-weed
Fight with a troll	Harry, Ron and Hermione fight a troll on Halloween	The Fellowship of the Ring fight a troll
Dark forest	Forbidden Forest	Old forest just outside of the Shire
"Elves" describing a race of people	House elves act as servants	A race of peoples from Middle Earth
Small, pitiable creature who talks in third person	Dobby	Gollum
Goblins	Run wizarding bank Gringotts	One of the evil races of middle earth (otherwise known as Orcs everywhere except in The Hobbit)
Holder of the keys	Hagrid (Keeper of the Keys)	Hurin (Warden of the Keys)
Mischievous pair	Fred & George Weasley	Merry and Pippin (film version)
Forbidden language	Saying "Voldemort"	Black Speech of Mordor
Dangerous willow tree	Whomping Willow	Old Man Willow
Basin of seeing	Pensieve	Galadriel's Mirror
Powerful, life-saving swords	Godric Gryffindor's sword	Anduril
Scar on forehead	Harry	Merry
Do not disturb water because of...	The giant squid	Watcher in the Water
Longed for safe-haven	During the summer Harry wishes he was back at Hogwarts	On their quest, the hobbits long to be back in the safety of the Shire.
Scar from Evil forces	Harry's scar on forehead	Frodo's scar from the Morgul Blade

Contributors: Joshua, Oriey, Nancy, Maddy, SnowRose, Odile, Bria and 3 of the similarities are from this site.

Similarities between the troll in Harry Potter and the troll in Lord Of The Rings

• They both appear because they've been brought by works of evil (HP Troll: Quirrel. LOTR Troll: orcs.)
• They both have gray "skin."
• They both fall down face forward.
• They both live in mountainous areas (HP Troll was a Mountain Troll. LOTR Troll lived in a cave inside the mountains.)
• They both have weapons that they use to attack the main character (HP Troll: uses a club. LOTR Troll: uses a spear.)
• It took team effort to bring down the trolls. (HP Troll: Hermione reminded Ron how to do the spell, and LOTR, Pippin stabbed the troll while Legolas wasted it with an arrow.)
• They both destroy the room they're in. (HP Troll: a couple of toilet cubicles and a sink. LOTR Troll: the door, smashes a few pillars to get to Legolas and the gravestone cover of Bali)