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.
yel
noun. cold, the cold
yelwa
adjective. cold
-ni
suffix. feminine suffix
-si
suffix. feminine suffix
-sse
suffix. feminine suffix
-tsi
suffix. feminine suffix
silde
noun. daughter
sui
noun. daughter
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 common feminine suffix in the Qenya Lexicon of the 1910s in words like varyani “foreigner (fem.)”, probably a suffixal form of ᴱQ. nî “woman” (GL/60) and often paired with its masculine equivalent ᴱQ. -nu.