Middle Primitive Elvish
-owo
suffix. masculine suffix
tow
root. *wool
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.
An unglossed root in The Etymologies of the 1930s with derivatives like ᴹQ. tó “wool” and ᴹQ. toa/N. taw “of wool, woollen” (Ety/TOW); ✶tŏwŏ “wool” also appeared in Common Eldarin: Noun Structure from the early 1950s (PE21/80). In the Qenya Lexicon of the 1910s, the root was instead ᴱ√OWO with derivatives like ᴱQ. oa “wool”, ᴱQ. oara “of wool”, and ᴱQ. ue “fleece” (QL/71). The Gnomish word G. uf⁽⁾ “fine wool, down” was probably related (GL/74), but the word for “wool” in the contemporaneous Gnomish Lexicon was G. tô with Qenya cognate ᴱQ. toa and primitive form ᴱ✶tou̯ (GL/71), hence very similar to the entry in The Etymologies. In Early Noldorin Word-lists from the 1920s Tolkien gave ᴱN. tô “fleece” or “wool” as a derivatives of ᴱ✶togo (PE13/154, 165).