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.

Gnomish

tump

noun. shed

A noun appearing as G. tump “shed” in the Gnomish Lexicon of the 1910s (GL/71), clearly a cognate to ᴱQ. tumpo “shed, barn” which was derived from either ᴱ√TṂPṂ or ᴱ√TUPU (QL/93, 95).

Neo-Sindarin: Since √TUP “cover” survived in Tolkien’s later writings, I think this word can be salvaged as ᴺS. tump “shed”, though it does conflict with [N.] tump “hump”.

bada-

verb. to build

tub-

verb. to cover

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.