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.
nab-
verb. to take, lay hold of
nabos
noun. seizure
A noun appearing as G. nabos “seizure” in the Gnomish Lexicon of the 1910s, a noun form of G. nab- “take, lay hold of”; compare also G. naptha- “seize” (GL/59). It was followed by an oth in parenthesis, probably indicating an alternate form or [nab]oth.
Neo-Sindarin: Since I retain ᴺS. nab- “take, lay hold of” for purposes of Neo-Sindarin, I would adapt this noun as ᴺS. nabas “seizure” = “✱act of taking”.
naboth
noun. seizure
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 verb appearing as G. nab- “take, lay hold of” in the Gnomish Lexicon of the 1910s (GL/59), apparently derived from the early root ᴱ√NAPA which was a variant of ᴱ√MAPA “seize” (QL/59, 64). Its past form nôbi appeared in the untranslated phrase G. nôbi i·mab ’len suila ontha from the contemporaneous Gnomish Grammar, apparently “✱he took the slender hand of his daughter” (GG/11).
Neo-Sindarin: Since √NAP appears in Tolkien’s later writings with glosses like “grasp, seize quickly” (VT47/20), “take hold” (VT47/27), and “take, pick up” (VT47/28), I would retain ᴺS. nab- “to take, lay hold of” for purposes of Neo-Sindarin.