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 

karkane

noun. row of teeth

A word for a “row of teeth” in The Etymologies of the 1930s, an elaboration of ᴹQ. karka “tooth” (Ety/KARAK).