Early Quenya
falmarin
noun. sea-fay (male), spirit of the sea foam
falmar
noun. wave (as it breaks), foamcrest
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.
The spirits of the sea foam appearing in the earliest Lost Tales (LT1/66). It is an elaboration of falma “foam” as suggested by Christopher Tolkien (LT1A/Falman).