Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

noldorin

proper name. Gnomish

Qenya [Ety/MŌ; LRI/Noldorin; PE18/023; PE18/026; RSI/Noldorin; SMI/Noldorin; TII/Noldorin; WRI/Noldorin] Group: Eldamo. Published by

lóna

adjective. dark

nyarro

noun. rat

A noun in The Etymologies of the 1930s glossed “rat” derived from primitive ᴹ✶nyadrō under the root ᴹ√NYAD “gnaw” (Ety/NYAD). In The Etymologies as published in The Lost Road, the form was incorrectly given as nyano (LR/379), but Carl Hostetter and Patrick Wynne corrected this to nyarro in their Addenda and Corrigenda to the Etymologies (VT46/7).

Qenya [Ety/NYAD; EtyAC/NYAD] Group: Eldamo. Published by

orko

noun. goblin

Qenya [Ety/ÓROK; LR/406] Group: Eldamo. Published by

qesset

noun. pillow

A noun for “pillow” in The Etymologies of the 1930s under the root ᴹ√KWES having to do with feathers (Ety/KWES). Given its cognate N. pesseg, its stem form is probably quessec- as suggested by Helge Fauskanger (QQ/quesset).