similarity

similarity, resemblance, analogy, likeness

这些名词均含“相似，类似”之意。
similarity: 指不同的人或事物在外表、特征、程度或性质等方面有某些相似之处。
resemblance: 指外观或性质有相似之处。
analogy: 指外表或实质均不相同的事物对比之下的类似之处。
likeness: 普通用词，指人或物从外观看去，有很明显的相似之处，或完全相似。

名词 similarity:

1. the quality of being similar
2. a Gestalt principle of organization holding that (other things being equal) parts of a stimulus field that are similar to each other tend to be perceived as belonging together as a unit
   同义词：law of similarity

1. Similarity of structure between organs or parts, possibly of dissimilar function, that are related by common descent.
   同构发生，同源发生源于同一祖先，可能功能不同的器官或部分在结构上的相似
2. An inherent similarity between persons or things.
   相似人或事物之间遗传上的相似之处
3. Having such a close similarity or resemblance as to be essentially equal or interchangeable.
   可互换的十分类似或相象以至于本质上相等的或能互换的
4. The similarity between them has often been remarked on.
   他们之间很相似，这是常有人提到的事。