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.
srō
root. *east
-rō
suffix. -reason
-rō
suffix. agent
rō/oro
root. rise, up, high
oro
root. rise, up, high
tār(ō)
noun. king
-ndō
suffix. agental suffix
orta-
verb. to rise
rāu
noun. lion
-nō
suffix. agent
on-rō
adverb. *for the very same reason
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 root appearing in a rejected page of roots from the Quenya Verbal System (QVS) written in 1948 (PE22/127), possibly as a variant of √RŌ/ORO that Tolkien introduced to explain S. rhûn “east” after he decided initial r- did not become rh- in Noldorin/Sindarin; see the entry on S. rhûn for discussion.