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!

Gnomish

omlos

noun. (horse) chestnut tree

A noun appearing as G. omlos “(horse) chestnut tree” in the Gnomish Lexicon of the 1910s, an elaboration of G. omla “a horse chestnut” (GL/62).

Neo-Sindarin: Its etymology was obscure even in the 1910s, but since there are no later alternatives I would retain ᴺS. omlos “chestnut tree” for purposes of Neo-Sindarin. Its initial element would have to be based on something like omb- for the m to have survived; compare to S. imlad < ✶imbi-lătă (PE17/87). Since I don’t see a way to salvage G. omla, I would use ᴺS. omlos for a “chestnut” as well.

Elements

WordGloss
omla“a horse chestnut”