"Glamhoth" was a Sindarin word for the Orcs that meant 'din-horde'. Example: "Gurth an Glamhoth", said Tuor, meaning "Death to the Glamhoth" or "Death to the Orcs".
"Gorgûn" was the name that Ghân-buri-Ghân of the wild men of the Drúadan Forest used for the Orcs in their own language.
"Yrch" was the term used by Haldir and his brothers, who were Elves of Lothlórien. This same word was also used by Legolas, indicating that it is Sindarin.
