Bush-league and Second-string

Bush-league adjective - Falling short of a standard.

Second-string and bush-league are semantically related In some cases you can use "Second-string" instead an adjective phrase "Bush-league".

Second-string adjective - Being a replacement or substitute for a regular member of a team.

Bush-league and second-string are semantically related in insignificant topic. Sometimes you can use "Bush-league" instead an adjective phrase "Second-string", if it concerns topics such as inferior, minor, under.