At the beginning of a game of chess are there are more of any piece on the board than any other?

There are more pawns on the board than any other since each player has 8 pawns. However, sometimes pawns are not referred to as "pieces." They are simply pawns while all the other combatants including the rooks, knights, bishops, king and queen are called pieces. In that regard, there is no "piece" that is more numerous than any other. There are 2 rooks, 2 knights and 2 bishops, so they are all equal in number.