Qenya
atsa
noun. claw, catch, hook, claw, catch, [pointy] hook
atsa
noun. tassel, fryse, fringe
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 in The Etymologies of the 1930s glossed “catch, hook, claw” derived from the root ᴹ√GAT (Ety/GAT). This root had one other derivative, the verb N. gad- “catch”, so it seems likely that ᴹQ. atsa can refer to any curved, pointy thing for catching or holding, so that “catch” (as a noun) is probably its original sense. In notes on The Feanorian Alphabet from the 1930s and 40s, however, it was glossed only “claw” (PE22/22, 50) and in the 1940s document its gloss was revised to ᴹQ. atsa “tassel, fryse, fringe” from a distinct root ᴹ√TAS (PE22/50 note #187).
Neo-Quenya: For purposes of Neo-Quenya, I prefer to use atsa as “claw, catch, [pointy] hook” and would use ᴹQ. fas for “fringe, tassel” or ᴱQ. taste “fringe”; see those entries for discussion.