The term "reaped benefit" suggests receiving advantages or rewards as a result of one's efforts or investment. The antonyms for reaped benefit are words implying unfavorable outcomes or no returns gained. Words like missed opportunities, loss, waste, unproductive, disadvantage, and fruitless are opposite of reaped benefits. For instance, if we say someone missed the opportunity, it means that they did not benefit from it. In contrast, if we say that they enjoyed the benefit, it means that they have received something helpful. Therefore, it is important to focus on the right words when communicating to convey the right meaning.