关于“failure”的近义词和反义词，综合权威资料整理如下：
一、近义词
defeat 强调在竞争或战斗中失败，如：
> The team was defeated in the championship. （球队在锦标赛中失败了）
flop
多用于形容计划或作品的彻底失败，如：
> The movie was a flop at the box office. （这部电影在票房上失败了）
breakdown
可表示机械故障或计划破产，如：
> The car suffered a breakdown on the highway. （汽车在高速公路上抛锚了）
disaster
强调灾难性失败，如：
> The company's failure to adapt led to its downfall. （公司未能适应市场而破产）
lack of success
表示未达到预期目标，如：
> His project was a failure due to lack of funding. （由于资金不足，他的项目失败了）
二、反义词
success
最直接的反义词，表示成功或成就，如：
> The company's failure was a lesson learned from success. （公司的失败是从成功中吸取的教训）
三、用法补充
抽象失败（如策略失败）：
> The company's failure to innovate led to its demise.
具体失败（如考试不及格）：
> His failure to pass the exam was a major setback.
固定搭配： Failure is the mother of success.
Failure to act is failure in itself.（不行动本身就是失败）
通过以上分类和例句，可更全面地理解“failure”在不同语境中的用法及替代表达。
