Early Primitive Elvish
þeχē
noun. eye, pupil
þehe
root. *see
sehe
root. *see
ske-ndá
noun. eye
þχe-ndǝ
noun. eye
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.