Go-getter and Mainstay

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

Mainstay and go-getter are semantically related. In some cases you can use "Mainstay" instead a noun phrase "Go-getter".

Mainstay noun - Something or someone to which one looks for support.

Go-getter and mainstay are semantically related. Sometimes you can use "Go-getter" instead a noun "Mainstay".