Nonce /(nŏns)/

Nonce

n.
  1. The one or single occasion; the present call or purpose; -- chiefly used in the phrase for the nonce, i. e. for the present time.
    The miller was a stout carl for the nones.
    And that he calls for drink, I 'll have prepared him A chalice for the nonce.

Phrases & Compounds

Nonce word
“a word apparently employed only for the nonce”.