Middle Primitive Elvish
lir
root. *row
lir
root. sing, trill
glir
root. sing, trill
lin
root. sing
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.
An unglossed root in The Etymologies of the 1930s server as the basis for N. lhîr “row” in N. oeglir “range of mountain peaks” (Ety/LIR²). Tolkien’s continued use of aeglir in his later writings (in Hithaeglir “Misty Mountains; Line of Misty Peaks”) indicates its ongoing validity (Let/180; RC/11).