Qenya
tulma
noun. event
kanya ére kata tulma alwara
to be wise after the event is useless
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 for “event” in the Quenya Verbal System (QVS) from 1948 (PE22/124). It is apparently a combination of ᴹ√TUL “come” with the instrumental suffix ᴹ✶-mā, so perhaps originally meaning “✱a thing that is come”.