dissimilar       
adjective uk/ˌdɪsˈsɪm.ɪ.lər/ us/ˌdɪsˈsɪm.ə.lɚ/
 不同的,有区别的
different
  The new house is not dissimilar (= is similar) to our old one, except that it's slightly bigger. 新房子与我们的旧房子相比并没有什么不同,只是稍大一些。 
 Synonyms: differentdiverseheterogeneous 
Opposites: alike similar