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.
-wi
suffix. dual
-wi
suffix. noun suffix
-la
suffix. noun suffix
-li
suffix. noun suffix
-od
suffix. noun suffix
-on
suffix. noun suffix
-st
suffix. noun suffix
-thi
suffix. noun suffix
-tt Archaic
suffix. dual
-ui
suffix. dual
-wen
suffix. noun suffix
-weth
suffix. noun suffix
um
pronoun. we
umin
pronoun. we
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.