gold rush

English Thesaurus

1. a large migration of people to a newly discovered gold field (noun.act)

hypernym	:	migration,
definition	:	the movement of persons from one country or locality to another (noun.act)

2. a sudden happening that brings good fortune (as a sudden opportunity to make money) (noun.event)

hypernym	:	happening, natural event, occurrence, occurrent,
definition	:	an event that happens (noun.event)