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.
eng
noun/adjective. smooth, level
eng(a)
noun. plain, vale
bladwen
noun. plain
A noun in the Gnomish Lexicon of the 1910s glossed “a plain” (GL/23), probably derived from the root ᴱ√PALA “flatness” as suggested by Christopher Tolkien (LT1A/Palúrien; QL/071).
na-
verb. to be
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 in the Gnomish Lexicon of the 1910s given as enga “plain, vale” (GL/32). It also appeared in the Name List to the Fall of Gondolin as eng “a plain or vale” (PE15/24). It was probably derived from the early root ᴱ√EŊE from Qenya Lexicon which had derivatives like ᴱQ. endl “plain, vale” (QL/36).