Big shot and Go-getter

Big shot noun - One of high position or importance within a group.

Go-getter and big shot are semantically related. In some cases you can use "Go-getter" instead a noun phrase "Big shot".

Go-getter noun - An ambitious person who eagerly goes after what is desired.

Big shot and go-getter are semantically related. Sometimes you can use "Big shot" instead a noun phrase "Go-getter".