tion为后缀的单词是名词吗

　　They held a snap election.

　　他们临时举行了选举。

　　The summer house was a simple wooden construction.

　　那座避暑别墅是简单的木结构建筑。

　　Heavy seas can cause cancellation of ferry services.

　　海上起风浪会导致渡轮航班取消。

　　I wrote the letter at his dictation.

　　我照他的口述写信。

　　The bathroom is entirely my own creation

　　浴室完全是由我设计的。

　　It's time to put our plan into operation.

　　现在应该执行我们的计划了。