Early Quenya
tyus
noun. cud
tyúka
noun. cud
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 appearing as ᴱQ. tyus (tyuks-) “cud” in the Qenya Lexicon of the 1910s derived from the early root ᴱ√TYUKU “chew” (QL/50). It became ᴱQ. tyúka “cud” in Early Noldorin Word-lists of the 1920s as a cognate of ᴱN. cig from primitive ᴱ✶kiwka (PE13/140).
Neo-Quenya: The form tyúka veers too close to later ᴹQ. tiuko “thigh” (Ety/TIW), so I’d instead restore the 1910s form as ᴺQ. tyuxë [tyukse] “cud” derived from the Neo-Root ᴺ√TYUK.