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.
tast
noun. border, fringe
tast
noun. total, amount
A word appearing as G. tast “total, amount” in the Gnomish Lexicon of the 1910s based on G. tath- “count” (GL/69), clearly based on the early root ᴱ√TAÞA (QL/90).
Neo-Sindarin: For purposes of Neo-Sindarin I would update this word to ᴺS. nost “total, amount” taking the later root √NOT “count” and combining it with the suffix ✶-dā “product of an action” (with t-d > st), so originally “✱a product of counting”.
tant
noun. a number
tathn
noun. number
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 word appearing as G. tast “border, fringe” (GL/69), clearly based on the early root ᴱ√TASA which had a derivative ᴱQ. taste “fringe” in the contemporaneous Qenya Lexicon (QL/89).
Neo-Sindarin: Since I retain ᴺQ. tastë “fringe” based on the Neo-Root ᴺ√TATH, I would retain ᴺS. tast “border, fringe” for purposes of Neo-Sindarin as well.