Qenya
yat
noun. goat
yat
noun. neck, neck; [ᴱQ.] isthmus
va
preposition. away
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.
The word ᴹQ. yat (yak-) “goat” appeared in the Declension of Nouns from the early 1930s (PE21/24).
Conceptual Development: In the Qenya Lexicon of the 1910s and Early Qenya Word-lists of the 1920s, ᴱQ. yakko was “ox” (QL/105; PE16/132). In Common Eldarin: Noun Structure of the early 1950s, Tolkien gave the possibly-related primitive form ✶najak- for “goat”, with masculine and feminine variants ✶najakō “he-goat” and ✶naikē “she-goat” (PE21/82).
Neo-Quenya: Helge Fauskanger used ᴺQ. naico for (male?) “goat” in his NQNT (NQNT) as a derivative of ✶najakō, and I would recommend this over ᴹQ. yat for this purpose. However, I’d recommend ᴺQ. nyéni for a female goat (adapted from ᴱQ. nyéni) since it (a) is more distinctive than ✱naice and (b) does not conflict with ᴹQ. naike “sharp pain”; Helge Fauskanger used nyéni in NQNT as well.