Gnomish
caf
noun. blade
caf-
verb. to taste (used of the thing)
cim Archaic
noun. blade
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 (archaic) noun appearing as G. †cim “blade” in the Gnomish Lexicon of the 1910s (GL/26). The noun G. caf “blade” also appeared in the same document, but it was deleted (GL/24).
Neo-Sindarin: The root √KIM “edge, brink of” appeared in Tolkien’s writing of the 1960s, with derivatives like Q. címa “edge of a cutting weapon/tool” (PE22/149). Therefore, I think this Gnomish noun might be retained for purposes of Neo-Sindarin as ᴺS. cim “blade”, perhaps derived from primitive ✱kimbē. I would also assume this Neo-Sindarin word was not archaic.