What's the main difference between a "billiard" and a "pool?"
Native speaker’s answer
Rebecca
Billiards and pool are a little different based on how they are played. Billiards is played on a table without pockets and only uses three balls. Pool involves a table with six pockets and involves 9 or 12 balls in order to play. Billiards used to refer to all sports played with cues and although some people still use the terms interchangeably, they are actually different sports.