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.
laltha-
verb. to dance
tinta-
verb. to dance
A noun glossed “dance” in the Gnomish Lexicon of the 1910s (GL/70), clearly based on the early root ᴱ√TṆTṆ (QL/93), probably with [[g|short syllabic [ṇ] becoming [in]]]. It had a past form {tinti >>} tanti showing the development of [[g|long syllabic [ṇ̄] to [an]]].
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. laltha- “to dance” in the Gnomish Lexicon of the 1910s, a verb form of G. lalt “a dance” (GL/52).
Neo-Sindarin: For purposes of Neo-Sindarin, I would adapt this word as ᴺS. liltha- for better compatibility with the later root ᴹ√LILT “dance”.