The word "preferments" refers to advancements, promotions or favors given to a particular person, group or entity. The antonyms for "preferments" would therefore be demotions, setbacks, punishments or reprimands. Demotion refers to the act of decreasing status or rank, while a setback is a hindrance or obstacle that leads to a reversal of progress. Punishment is the act of penalizing someone for wrongdoing, while reprimand refers to a formal criticism or rebuke for inappropriate behavior. In contrast to "preferments", these antonyms signify setbacks or negative outcomes, rather than positive advancements or gains.