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.
ulm
noun. jar, flagon
gulma
masculine name. Gulma
ceral
noun. jar
A noun appearing as G. ceral “jar” in Gnomish Lexicon Slips of the 1910s from primitive ᴱ✶keréldǝ (PE13/116). It is likely based on the early root ᴱ√KERE “turn” (QL/46).
Neo-Sindarin: A similar root √KWER “revolve” appears in Tolkien’s later writing, so I would adapt this noun as ᴺS. perol “jar” from ancient ✱kwerḷ.
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. ulm “jar, flagon” in the Gnomish Lexicon of the 1910s derived from ᴱ✶ḷm (GL/74). In the contemporaneous Qenya Lexicon Tolkien said it was not related to the early root ᴱ√ULU “pour” because Gnomish derivatives of that root showed gul- indicating a true root form ✱ᴱ√GULU (QL/97). Tolkien soon changed his mind and decided the root for “pour” was in fact ᴱ√ULU, and the primitive form ᴱ✶ḷm was deleted from the Gnomish Lexicon.
Neo-Sindarin: I would retain this word for purposes of Neo-Sindarin, but would assume it was derived from ✱ul-mā “a thing for pouring”. As such, I would assume its use included pitchers with handles as well as flagons and jars. Its form would need to be adapted as ᴺS. olf to fit Sindarin phonetics, with *u* becoming *o* before *a* and then [[s|lm > lf (pronounced [lv])]].