Gnomish
fem
noun. venom (of snakes), poison in general
fwi-
prefix. fem. patronymic prefix
umir
noun. nobody, no one (fem.)
lenwin
noun. ‘arrival’, a stranger (fem.)
gwinwed
adjective. female
gwineth
adjective. female
nîr Archaic
noun. woman
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 “fem. patronymic prefix” in the Gnomish Lexicon of the 1910s, with a suffixal form -thwi (GL/36), probably meaning “✱daughter of” given its comparison to G. suil “daughter” (GL/68) and probably derived from the early root ᴱ√SUẈU (QL/87).