Middle Primitive Elvish
glam
root. *noise, echo
hō
noun. shout
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.
A (Noldorin-only) root in The Etymologies of the 1930s, a strengthened form of the root ᴹ√LAM which was the basis of general sound words (Ety/GLAM). The derivatives of ᴹ√GLAM include N. glamm “shouting, confused noise” and N. glavra- “babble” but also N. glamor “echo” and N. glamren “echoing”, the last of these seen in N. Dorlamren, the pure Noldorin form of N. Dor-lómen “Land of Echoes”, which incorporates the Ilkorin word lómen “echoing” (LR/249; Ety/LAM).
The word S. glam “din, uproar, the confused yelling and bellowing of beasts” reappeared in the Quendi and Eldar essay written in 1959-60, where it was an element (as it was earlier) in the collective name for orcs: S. Glamhoth “Din-horde” (WJ/391). This strongly indicates that the “confused sounds” aspect of this root survived into Tolkien’s later conception of the language. However, the “echo” portion seemed to have been transferred to the unstrengthened form of this root √LAM as with (West) Sindarin loven “echoing” vs. North Sindarin lómin, which remained an element in Dor-lómin “Land of Echoes”, albeit reconceived of as a North Sindarin name (PE17/133).