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 replace phrase "Second string" with "Bush-league", this phrases are similar.

Second string noun - A squad of players that are available either individually or as a team to relieve or replace the players who started the game.

Bush-league and second string are semantically related. Sometimes you can use "Bush-league" instead an adjective phrase "Second string".