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 

koromindo

noun. cupola, dome

A noun in The Etymologies of the 1930s glossed “cupola, dome”, apparently a combination of variants of ᴹQ. koron “globe” and ᴹQ. mindon “tower” (Ety/KOR).

Elements

WordGloss
koron“globe, ball”
mindon“(isolated) tower”