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.

Early Quenya

qelu

noun. well, spring, source

A noun appearing as ᴱQ. qelu “well, spring, source” in the Qenya Lexicon of the 1910s, derived from the root ᴱ√QEL+U, a variant of ᴱ√KELU (QL/76). It also appeared with the gloss “well, spring” in the Poetic and Mythological Words of Eldarissa (PME/76).

Neo-Quenya: Related words ᴱQ. qelume “source, origin” and ᴱQ. qeluva “original” indicate this word could be used for the “source” of things beyond just water. As such, I think this word might be salvaged in Neo-Quenya as ᴺQ. celu “source, origin”, from the later root √KELU. The form quel- can’t be retained, as this means “fade” in Tolkien’s later writings, and the abstract form celumë can’t be used, as this means “flowing”.

Early Quenya [PME/076; QL/076] Group: Eldamo. Published by

qelu-

verb. to well up

A verb glossed “well up” in the Qenya Lexicon of the 1910s derived from the root ᴱ√QEL+U, a variant of ᴱ√KELU (QL/76).

Early Quenya [QL/076] Group: Eldamo. Published by

ausi-

prefix. well

Early Quenya [QL/033] Group: Eldamo. Published by

mande

adverb. well

Early Quenya [QL/058] Group: Eldamo. Published by

vande

adverb. well

Early Quenya [QL/099] Group: Eldamo. Published by

tampo

noun. well

A noun in the Qenya Lexicon of the 1910s given as ᴱQ. tampo “a well”, derived from the root ᴱ√TṂPṂ “build”; Tolkien considered transferring the word to ᴱ√TAPA “✱stretch” (QL/93). This word also appeared in the Poetic and Mythological Words of Eldarissa (PME/93).

Neo-Quenya: I think ᴺQ. tampo “well” might be salvaged in Neo-Quenya as a derivative of √TAM “construct”; it is used this way in Helge Fauskanger’s NQNT (NQNT).

Early Quenya [PME/093; QL/093] Group: Eldamo. Published by

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.