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

ettarendi

noun. cousinship

A noun for “cousinship” in the Qenya Lexicon based on ᴱQ. etta “cousin” with variants ettarendi and ettaresta (QL/36). The second element of these words is ᴱQ. rendi or ᴱQ. resta “kinship, kin, kindred, clan” (QL/79).

Early Quenya [QL/036] Group: Eldamo. Published by

ettaresta

noun. cousinship

rendole

noun. cousinship

A word appearing as ᴱQ. rendole “cousinship” in the Qenya Lexicon of the 1910s, an abstract noun formation from ᴱQ. rendo “cousin” (QL/79).

Neo-Quenya: I would retain this word as ᴺQ. rendolë, an elaboration of ᴺQ. rendo “male cousin” from the Neo-Root ᴺ√RE(N)D.

Early Quenya [QL/079] 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.