Is it right to express similarity like this?
My brother and I look [alike] / [like each other] not only in appearance, but also in behaviors.
Is there a better way to express it?
Answer
I’d use the word similar, as it has a broader meaning than look alike.
My brother and I are quite similar, not only in appearance, but also in behavior.
Attribution
Source : Link , Question Author : mohsen kamrani , Answer Author : Stephie