同义词是assist each other，例如：
1.Hu***and and wife have the duty to support and assist each other.夫妻间有互相扶养的义务。
2.Arrangements made between nations to assist each other.民族之间相互支持而做的安排。
3.Along with other helpers, they assist each other to finish the entire film.与其他人一起，他们互相协助完成了整部电影的拍摄。