Middle Primitive Elvish
tuluk
root. *support, prop; steady, firm
smal
root. yellow
smalinā
adjective. yellow
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 unglossed root in The Etymologies of the 1930s with derivatives like ᴹQ. tulka “firm, strong, immoveable, steadfast”, N. tolog “stalwart, trusty”, and ᴹQ. tulko/N. tulu “support, prop” (Ety/TULUK). The “steady, firm” senses of the 1930s root are consistent with derivatives of the earlier root ᴱ√TULUK from the Qenya Lexicon of the 1910s with derivatives like ᴱQ. tulka- “fix, stick in, set up, establish”, G. tulga- “make firm, confirm, settle, steady; comfort” and ᴱQ. tulunka/G. tulug “steady, firm” (QL/95; GL/71); nearby ᴱ√TḶKḶ (with no derivatives) may also have been related (QL/93).
However, the Qenya Lexicon of the 1910s had a distinct root ᴱ√TḶPḶ with derivatives like ᴱQ. talpa/G. talp “support, prop”, ᴱQ. tulpu-/G. talpa- “prop up”, and G. clib- “uphold, support” (QL/93; GL/26, 69). This ᴱ√TḶPḶ may have been related to ᴱ√TULU as presented in the Qenya Lexicon, which in this document had the more ancient sense “uphold, support” (QL/95). Thus I think the 1930s derivatives of ᴹ√TULUK having to do with “support” may have been transferred from 1910s ᴱ√TḶPḶ.