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.
mekta
adjective. centre
metl
noun. centre
A noun for “centre” in the Qenya Lexicon of the 1910s under the early root ᴱ√MEKE (QL/60), also mentioned in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/60).
tóle
noun. centre
A noun for “centre” in the Qenya Lexicon of the 1910s under the early root ᴱ√TOLO (QL/94).
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 for “centre” in the Qenya Lexicon of the 1910s under the early root ᴱ√MEKE (QL/60).