Early Noldorin
amoth
noun. shoulder
am(b)
noun. breast
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 word appearing as ᴱN. amoth “shoulder” in Early Noldorin Word-lists of 1920s derived from ᴱ✶a-mbod-t’ (PE13/137, 159) and related to ᴱN. bost “back” (PE13/139). In these documents amoth was an element in the name ᴱN. Egallmoth “He of the Wide Shoulders” with an initial element of ᴱN. egall “very broad” (PE13/142, PE13/159).
In the Gnomish Lexicon of the 1910s, the name G. Egalmoth was glossed “Broad-back” and it contained G. alm “back, shoulders” from primitive ᴱ✶alđam- (GL/19), while in Gnomish Lexicon slips modifying this document, the word for “a shoulder” was G. {awlan >>} alan derived from ᴱ✶aldǝmā (PE13/109). These 1910s words were probably based on the early root ᴱ√ALA “spread”, from which ᴱQ. almo or aldamo “back, shoulders” was derived (QL/29).
In Tolkien’s later writings, S. Egalmoth was given an entirely new etymology as “Pointed Helm-crest” (WJ/318).
Neo-Sindarin: Despite the change in the meaning of Egalmoth, I think ᴺS. amoth “shoulder” can be retained for purposes of Neo-Sindarin, reconceived as a derivative of √AM “up” (< ✱ammots-) and perhaps originally an augmentative using the suffix -oth = “✱most up (part of the torso)”.