Doriathrin
dairon
masculine name. Dairon
nan-dairon
place name. *Valley of Dairon
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
dairon
masculine name. Dairon
nan-dairon
place name. *Valley of Dairon
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
An Ilkorin place name appearing in The Etymologies from the 1930s, likely a combination of nand “valley” and the name Dairon (Ety/DAY).