Early Quenya
helke
noun. ice
yalka
noun. ice
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 “ice” in the Qenya Lexicon under the early root ᴱ√ẎALA “ring, sound hollow” (QL/105). Elsewhere in the Qenya Lexicon Tolkien contrasted it with ᴱQ. helke “ice” (QL/39), and in later writings Tolkien retained helke and seems to have abandoned yalka.