Main Difference
The main difference between Goblin and Troll is that the Goblin is a mythical creature and Troll is a supernatural being in Norse mythology and Scandinavian folklore.
Goblin
A goblin is a monstrous creature from European folklore, first attested in stories from the Middle Ages. They are ascribed various and conflicting abilities, temperaments and appearances depending on the story and country of origin. They are almost always small and grotesque, mischievous or outright malicious, and greedy, especially for gold and jewelry. They often have magical abilities similar to a fairy or demon. Similar creatures include brownies, dwarfs, duendes, gnomes, imps, and kobolds.
Troll
A troll is a class of being in Norse mythology and Scandinavian folklore. In Old Norse sources, beings described as trolls dwell in isolated rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings.
Later, in Scandinavian folklore, trolls became beings in their own right, where they live far from human habitation, are not Christianized, and are considered dangerous to human beings. Depending on the source, their appearance varies greatly; trolls may be ugly and slow-witted, or look and behave exactly like human beings, with no particularly grotesque characteristic about them.
Trolls are sometimes associated with particular landmarks, which at times may be explained as formed from a troll exposed to sunlight. Trolls are depicted in a variety of media in modern popular culture.
Goblin (noun)
One of various hostile supernatural creatures, now especially a malevolent and grotesque diminutive humanoid.
Troll (noun)
A supernatural being of varying size, now especially a grotesque humanoid creature living in caves or hills or under bridges. from early 17th c.
Troll (noun)
An ugly person of either sex, especially one seeking sexual experiences.
Troll (noun)
Optical ejections from the top of the electrically active core regions of thunderstorms that are red in color that seem to occur after tendrils of vigorous sprites extend downward toward the cloud tops.
Troll (noun)
An instance of trolling, especially, in fishing, the trailing of a baited line. from circa 1600
Troll (noun)
A person who provokes others (chiefly on the Internet) for their own personal amusement or to cause disruption. from late 20th c.
Troll (noun)
The act of moving round; routine; repetition.
Troll (noun)
A song whose parts are sung in succession; a catch; a round.
Troll (noun)
A trolley.
Troll (verb)
To saunter. from late 14th c.
Troll (verb)
To trundle, to roll from side to side. from early 15th c.
Troll (verb)
To draw someone or something out, to entice, to lure as if with trailing bait. from the 1500s
“passage=It was necessary to troll them along two years with the hope of employing their usual methods, in order to get them to a place too far from their starting-point for retreat.| author=Thomas William Lawson| pageurl=http://books.google.com/books?id=IoQDAAAAYAAJ&pg=PA690| title=Fools and Their Money: Some After-Claps of Frenzied Finance| journal=Everybody’s Magazine| volume=XIV(5) May 1906| page=690”
Troll (verb)
To fish using a line and bait or lures trailed behind a boat similarly to trawling; to lure fish with bait. from circa 1600
Troll (verb)
To angle for with a trolling line, or with a hook drawn along the surface of the water; hence, to allure.
Troll (verb)
To fish in; to try to catch fish from.
Troll (verb)
To stroll about in order to find a sexual partner, to cruise from 20th c.
“He spends most of his waking hours trolling on WIRE.”
Troll (verb)
(to post inflammatory material so as) to attempt to lure others into combative argument for purposes of personal entertainment and/or gratuitous disruption, especially in an online community or discussion from late 20th c.
Troll (verb)
By extension, to incite anger (including outside of an Internet context); to provoke, harass or annoy.
Troll (verb)
To move circularly; to roll; to turn. from the 15th c.
Troll (verb)
To send about; to circulate, as a vessel in drinking.
Troll (verb)
To sing the parts of in succession, as of a round, a catch, and the like; also, to sing loudly, freely or in a carefree way. from the 16th c.
Troll (noun)
(in folklore) an ugly creature depicted as either a giant or a dwarf.
Troll (noun)
a person who makes a deliberately offensive or provocative online post
“one solution is to make a troll’s postings invisible to the rest of community once they’ve been recognized”
Troll (noun)
a deliberately offensive or provocative online post.
Troll (noun)
a line or bait used in trolling for fish.
Troll (verb)
make a deliberately offensive or provocative online post with the aim of upsetting someone or eliciting an angry response from them
“if people are obviously trolling then I’ll delete your posts and do my best to ban you”
“you folks taking this opportunity to troll me, you really need to reassess your values in your life”
Troll (verb)
carefully and systematically search an area for something
“a group of companies trolling for partnership opportunities”
“I spent tonight trolling the Internet for expensive lighting gear”
Troll (verb)
fish by trailing a baited line along behind a boat
“we trolled for mackerel”
Troll (verb)
walk in a leisurely way; stroll
“we all trolled into town”
Troll (verb)
sing (something) in a happy and carefree way
“he trolled a note or two”