Second string and Second banana

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.

Second banana and second string are semantically related In some cases you can use "Second banana" instead a noun phrase "Second string".

Second banana noun - Someone who serves in a subordinate capacity or plays a secondary role.

Second string and second banana are semantically related in sidekick topic. You can use "Second string" instead a noun phrase "Second banana".