Lesser and Second string

Lesser adjective - Having not so great importance or rank as another.

Second string and lesser are semantically related. In some cases you can replace phrase "Second string" with "Lesser", this terms 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.

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