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

ungwe

noun. spider

Early Quenya [GL/43; LT1A/Ungwë Lianti; LT1I/Ungweliantë; PE16/145; PME/104; QL/098] Group: Eldamo. Published by

ungwe fuiva

feminine name. the Spider of Night

Another name for Ungweliante (Ungoliant) doorkeeper in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa from the 1910s (QL/103; PME/81, 104), a combination of ungwe “spider” and fuiva “murky”. In the Qenya Lexicon it also appeared in the variant form Ungwe Tuita (QL/80).

Early Quenya [PE13/103; PME/081; PME/104; QL/080; QL/103] Group: Eldamo. Published by

ungweliante

feminine name. Great Spider Who Enmeshes

Early Quenya [GL/43; GL/75; LT1/152; LT1A/Ungwë Lianti; LT1I/Ungweliantë; LT2I/Ungweliant; PE15/08; QL/098; SMI/Ungoliant] Group: Eldamo. Published by

kangaris

noun. spider

A word for “spider” in the Qenya Lexicon of the 1910s, based on the verb ᴱQ. kanga- “weave, spin” from the early root ᴱ√KANGA (QL/45), also appearing in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/45).

Early Quenya [PME/045; QL/045] Group: Eldamo. Published by

maldor

noun. agony

Early Quenya [QL/058] 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.