Bonanza
Pronunciation : Bo*nan"za
Part of Speech : n.
Etymology : [Sp., prop. calm., fair weather, prosperity, fr. L. bonus good.]
Definition : Defn: In mining, a rich mine or vein of silver or gold; hence, anything which is a mine of wealth or yields a large income. [Colloq. U. S.]
Source : Webster's Unabridged Dictionary, 1913