In Tolkien's works, smaller Orcs are sometimes referred to specifically as "Goblins," so in this sense one may consider an Orc to be a larger and more brutish type of Goblin, however outside of Tolkien's works this is rarely true, and Orcs are often made out to be a distinct race from Goblins, although in the Warhammer setting Orcs and Goblins are related races, part of a larger family of races known as "Greenskins."
Orcs are almost always savage and/or warlike, and are usually made out to be evil, unintelligent and pitiful monsters, and are often a creature simply used for "slaying fodder" for quests. However in the Warhammer settings Orcs or "Orks" are playable armies, and there is a sense of whimsy and glorified stupidity about them.
The Warcraft setting they are also playable; and their bloodlust and depravity came from being controlled by a demon curse which they have freed themselves from, and now have a sense of honour. In some other settings they are also from time-to-time given this "noble savage" image.
"Well don't just stand there, slay them all!"
Orcs are goblin warriors that were created in the First Age of Middle-Earth by Melkor, an evil Valar (read, demon with godlike power), who captured a number of Elves and tortured and maimed them until they became Orcs.
Orcs, also called Orsimer in ancient times, are sophisticated barbarian beast peoples of the Wrothgarian Mountains, Dragontail Mountains, and Orsinium. They are noted for their unshakable courage in war and their unflinching endurance of hardships. In the past, Orcs have been widely feared and hated by the other nations and races of Tamriel, but they have slowly won acceptance in the Empire, in particular for their distinguished service in the Emperor's Legions. Orc armorers are prized for their craftsmanship, and Orc warriors in heavy armor are among the finest front-line troops in the Empire, and are fearsome when using their berserker rage. Most Imperial citizens regard the Orc society as rough and cruel, but there is much to admire in their fierce tribal loyalties and generous equality of rank and respect among the sexes.
The Hero of Daggerfall reported Gortwog gro-Nagorm united his people by establishing an autonomous enclave, and forced the Emperor Uriel Septim VII to recognize Orsinium as an equal of the other lesser kingdoms (such as Daggerfall or Sentinel).
Their religion centers around the worship of the Daedric Prince who governs outcasts, Malacath.
Orcs also make excellent warriors who excel in combat with Blunt weapons in Heavy Armor.
Tom: Cause, dude, I can smash up anything anywhere. You ever Played as on of the orcs?
Tom: They're like Micheal Myers on steriods!!!