Qenya
rá
noun. lion
ráva
noun. lion
ranko
noun. arm
rú
noun. lion
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.
A noun for “arm” in The Etymologies of the 1930s derived from primitive ᴹ✶ranku under the root ᴹ√RAK “stretch out, reach” (Ety/RAK).
Conceptual Development: The word ᴱQ. rā “arm” appeared Qenya Lexicon of the 1910s under the early root ᴱ√RAHA “stretch forward”, along with a variant rakta (QL/78). The Early Qenya Grammar and English-Qenya Dictionary of the 1920s instead had ᴱQ. ranko “arm” (PE14/76; PE15/69), a form which reappeared in The Etymologies of the 1930s (see above).