A neologism for “birth” coined by Helge Fauskanger for his NQNT (NQNT), an abstract noun form of Q. nóna “born”. I prefer to adapt the Early Qenya word nosta.
Sindarin
onnad
noun. birth
Quenya
nosta
birth, birthday
nónië
noun. birth
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
Gnomish
nosteg
adjective. birth
nosta noun "birth, birthday" (LT1:272; maybe not a valid word in Tolkiens later Quenya because the meaning of the corresponding verb was changed from "give birth" to "beget")