Second string and Small-fry

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.

Small-fry and second string are semantically related. In some cases you can use "Small-fry" instead an adjective phrase "Second string".

Small-fry adjective - Lacking importance.

Second string and small-fry are semantically related. Sometimes you can replace phrase "Second string" with "Small-fry", this phrases are similar.