Odd and Stange mean the same. They are used to refer to something unusual in a way that you cannot understand. Bizarre refers to something very unusual in a way that you think is amusing or hard to believe. odd It seemed odd that he didn’t say goodbye before leaving. That was an odd thing to say. His behaviour seems odd to me. strange I heard strange noises coming from the basement. It’s strange that we have never seen each other before. His behaviour seems strange to me. bizarre That is a bizarre haircut. She had a bizarre sense of humour. They were wearing some bizarre costumes for Mardi Gras.