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.
rond
noun. domed roof
rôth
noun. cave
A Doriathrin noun for “cave”, also appearing as roth, derived from primitive ᴹ✶rǭda or ᴹ✶roda (Ety/ROD, EtyAC/ROD). The [[ilk|[d] spirantilized to [ð] (“dh”)]] as usual, then after the final vowel was lost the [[ilk|final [ð] became [θ]]] as suggested by Helge Fauskanger (AL-Doriathrin/roth). The original sound [ð] is preserved in the plural rodhin.
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.
A noun meaning “domed roof” derived from a nasal-infixed form of the root ᴹ√ROD “roof, cave” (Ety/ROD).