Gnomish
bedhgad
noun. wedlock
besgad
noun. wedlock
bedhiod Archaic
noun. wedlock
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 noun in the Gnomish Lexicon of the 1910s appearing as G. bedhgad “wedlock”, a combination of the early root ᴱ√Beđ- for marriage words and G. gad “joint” (GL/22, 36). It replaced a more archaic form G. †bedhiod. It also had a variant form besgad whose origin is less clear, but I suspect it is a feminized variant based on G. bess “wife”.