there be 后面是不是不可以接抽象名词

there is a striking similarity between Aand B.- i don't think that this sentence is wrong..it's correct

英语很活的，没有这种规定。接抽象名次完全可以的。
there is a striking similarity between Aand B。
there are striking similarities between Aand B.
都正确，前者有一个相似点 后者多个

不是，similarity不可数