award，reward 这两个词都可以用作名词和动词，作名词时，意义相近，但不是同义词。 

1、作名词时，award的意思是“奖品”、“奖金”，其义与prize近似，两者都指因为作出杰出成就而受奖。而reward作名词时，其意为“赏金”、“酬金”或一些非金钱的报酬。

例如： 

The Olympic winner received a gold medal as an award.
奥林匹克的优胜者获得一枚金质奖章作为奖赏。

He won the second award of $ 2，000.
他获得二等奖，奖金二千元。 

We will offer a reward of ten thousand dollars for information about the case.
如果有人提供有关案件的情报，我们愿意出一万元赏金。 

We don't expect substantial rewards.
我们并不期望得到优厚的报酬。

The police are offering a big reward for information about the robbery.
警方出大笔赏金要求提供那起抢劫案的破案线索。

2、用作动词时，award的意思是“授予”、“颁发”、“判给”；reward则表示“报答”、“酬谢”之意。

例如： 

He was awarded the first prize for Outstanding Industrial Design.
他获杰出工业设计一等奖。 

We judge awarded him twenty thousand dollars as damages.
法官判给他二万元作为赔偿费。

They awarded John the first prize.
他们授予约翰一等奖。

You should reward them according to their deserts.
你应该对他们论功行赏。 

Is that how you reward me for my help？
你就是这样来报答我给你的帮助吗？ 

They rewarded the winners with fruits and flowers.
他们用水果和鲜花来奖赏优胜者。