Early Noldorin
orost
noun. ?rising, [G.] rising
amrost úr
sunrise
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 G. oros or orost· “rising” in the Gnomish Lexicon of the 1910s (GL/62), clear based on the early root ᴱ√ORO as suggested by Christopher Tolkien (LT1A/Kalormë; QL/70). Elsewhere in GL, orost was paired with G. orosaura “sunrise”, so it likely had that meaning as well (GL/62). The word orost also appeared unglossed in Early Noldorin Word-lists of the 1920s (PE13/151), but not thereafter.