Early Primitive Elvish
kaya
root. lie, rest; dwell
kaẏa
root. KAẎA
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.
This root appeared (unglossed) in the Qenya Lexicon of the 1910s as the basis for the words ᴱQ. kaïkta- “strangle” and ᴱQ. kailen “throat, gullet” (QL/46). The Ẏ indicates derivation from an ancient palatal spirant [c] or [ɟ] (PE12/15-16). There is no sign of this root past the 1910s.