the work of building or making something, especially buildings, bridges
construction
15
a situation in which a lot of people move to a place to try to find gold because they have heard that gold has been found there
gold rush
15
a very large farm on which animals are kept, especially in North and South America
ranching
15
an area of land made available for a particular group of people to live in
reservation
15
a person who arrives, especially from another country, in a new place and takes the land in order to live on it and farm it
settler
15
to start a company or organization that will continue for a long time
establish
15
when something increases in size, number or importance
expansion
15
to search and discover (about something)
explore
15
a border between two countries, or (especially in the past in the United States) a border between land used to grow crops where people live and wild land
frontier
15
a single person or thing, especially when compared to the group or set to which they belong