帮我把以下的动词变成名词（例如sing-singer歌手），谢了.

1.each不是动词是不是打错了
2.waiter侍者

1.statement声明
2.liberation解 放
3.relation联系
4.attendance出席
5.discussion讨论
6.direction知道
7.action动作
8.operation行动
9.invention发明
10.imagination想象

eacher
waiter
statement
liberation
relation
attendance
dicussion
direction
action/actor
operation
invention
imagination

1.each 是(adj. pron. adv.)
2.wait-(动词/名词)-waiter

1.state(n.)-station
2.liberate-liberation
3.relate-relation
4.attend-attention
5.discuss-discussion
6.direct-direction
7.act-actor（男）actress（女）
8.operate-operation
9.invent-invention
10.imagine -imagination

waitress/waiter
station
liberation
relation
attention
discussion
direction
action
operation
invention
imagination
each不清楚了，高手来回答。。