soica ("k") adj. "thirsty" (VT39:11)
Early Quenya
loire
adjective. thirsty
loimea
adjective. thirsty
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 Primitive Elvish
tloise
noun. tloise
Gnomish
luib
adjective. thirsty
Early Noldorin
faug
adjective. thirsty
Old Noldorin
phauka
adjective. thirsty
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.
Noldorin
faug
adjective. thirsty
faug
adjective. thirsty
Quenya
fauca
thirsty
parca
adjective. thirsty
soica
thirsty
soica
adjective. thirsty
An adjective for “thirsty” in notes from around 1960 derived from the root √SOK “drink” via i-infixion (VT39/11), a process which produced a small class of desiderative words in Quenya, as in “desiring to drink”. See the entry ᴹQ. fauka for earlier and alternate words for “thirsty”.
Sindarin
faug
thirsty
faug (gasping, choking), pl. foeg
faug
thirsty
(gasping, choking), pl. foeg
fauca ("k") adj. "thirsty" (PHAU; original glosses "thirsty, parched; lit. open-mouthed", VT46:9)