Early Quenya
aiqale
noun. a steep [thing], steepness
anwe or aiqale elta súrut lunte aiwendon lossiattea
*went on the heights driven by the wind a ship like a bird with a blossom-white neck
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. aiqale “a steep [thing], steepness” in the Qenya Lexicon of the 1910s, an abstract noun form of ᴱQ. aiqa “steep” appearing nearby (QL/29). Since ᴹQ. aiqa “steep” continued to appear in Tolkien’s later writings (Ety/AYAK), perhaps this word can be salvaged for Neo-Quenya writing as ᴺQ. aiqualë.