Gnomish
helc
adjective. ice-cold, icy, cold
helc
noun. ice
helw
adjective. ice-cold, icy, cold
heleg
noun. ice
geluim
masculine name. 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.