共同点的英文：
alliance
common ground

参考例句：

When referring to the similarity between people,things and actions, both as and like are used
在谈到人,事物或动作彼此有相同点或共同点时,使用as和like均可

The only thing we have in common is that we've Both been to France.
我俩唯一的共同点是我们都去过法国。

The two rival parties have no common ground between them.
这两个敌对的党派之间没有共同点.

The talks showed there was much we shared a lot in common.
谈判表明，我们有很多共同点。

He could identify with Connally.
他还是能与康纳利找到一些共同点的。

There are a lot of similarities in culture and tradition between China and Japan.
中国和日本在文化和传统方面有许多共同点。

We found after talking that we have a lot of things in common.
我们交谈以后发现我们有很多共同点。

"I think she is just a rich princess, but it looks like we have a lot in common. "
我以为她不过是千金小姐,但看来我们有许多共同点

Group of people sharing particular characteristics(eg place of origin) attending a gathering
参加某集会的一批具有某共同点(如所属地区)的人;代表团

A solid figure with a polygonal base and triangular faces that meet at a common point.
棱锥多面形的底痤和三角形的侧面在一个共同点处相接的固体的轮廓

alliance是什么意思：
n. 结盟；联盟

It was an uneasy alliance.
那是一个不稳定的联盟。

They are in alliance with each other.
他们结成了联盟。

Which country is the predominant member of the alliance ?
哪个国家在联盟中居於支配地位?

common是什么意思：
adj. 普通的；一般的；通常的；通俗的；公共的，共有的；共同的
n. 普通；平民；公共地

international common
国际公地

Commonness is happiness.
平凡是福。

A common danger causes common action
同仇敌忾

ground是什么意思：
n. 地面，土地
v. 着陆， 打基础
adj. 磨平的，磨碎的

on solid ground
在稳固的基础上

Their ship was grounded.
他们的船搁浅了。

The ground has thawed.
地面解冻了。