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.
na
preposition. of (the)
nan
preposition. of
dor-na-dhaideloth
place name. [Land of] Heaven Roof
ladwen-na-dhaideloth
place name. Heath of the Sky-roof
i·vrog na cuid arog
the horse is a swift animal
i·weg na an fofrin
man is a foolish creature
i·winin na gwandron
women are beautiful
a(n)
preposition. of
dor lalmin
place name. Dor Lalmin
to
proper name. To
a
preposition. of
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.