Early Quenya
palwa-
verb. to make wander
palwa
adjective. even, flat, level
palanka
adjective. even, flat, level
palanta
adjective. even, flat, level
paluva
adjective. even, flat, level
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.
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 adjective appearing as ᴱQ. paluva, palwa, palanka, palanta in the Qenya Lexicon of the 1910s, glossed “even, flat, level” and based on the early root ᴱ√PALA having to do with flat things (QL/71).
Neo-Quenya: Since √PAL continued to be used for wide and flat things in Tolkien’s later writing, I would retain ᴺQ. palwa “even, level, flat” for purposes of Neo-Quenya.