These names are made from the few Orcish words and names that Tolkien left us. They aren’t in line with the Orcish from the Hobbit movies (these names were made before then). We don’t have anyone (yet) devoted to the study of Orcish, so this is the best we can do.
Asholog - One Troll
Ashuruk - One Orc
Bagronk - Cesspool
Búbhoshum - Great One
Burzum - Darkness
Dugbúrz - Dark Filth
Ghâshbúrz - Dark Fire
Globuk - All Fools
Gûlbúbhosh - Great Wraith/Magician
Gûlburzum - Wraith/Magician of Darkness
Gûlghâsh - Wraith/Magician of Fire
Ologbúrz - Dark Troll
Pushdug - Dung Filth
Sharkû - Old Man
Snagabúrz - Dark Slave
Snagaburzum - Slave of Darkness
Snagaghâsh - Slave of Fire
Snagagûl - Slave of the Wraith/Magician
Snagasharkû - Slave of the Old Man
Urukbúrz - Dark Orc