The antonyms for "calls bets" are the words that indicate different actions like folding, raising or checking. When a player "calls bets" on a hand of poker, it means they are matching the amount of the current highest bet to stay in the game. However, if a player chooses to fold, they forfeit their hand and any bets already placed. On the other hand, raising involves increasing the current bet amount, which can often be used as a bluffing tactic. Lastly, checking is an option to stay in the game without placing any additional bets. Thus, understanding these antonyms is essential to master the game of poker.