sham : 指可以以假乱真的东西，尤指明显的欺骗。
- It turned out that he wasn't a real doctor at all - he was just a sham.
- They claimed that the election had been fair, but really it was a sham.
fake : 通常指没有价值的冒牌货或代用品，但目的不一定全是为骗人。
- Experts revealed that the painting was a fake.
- The gun in his hand was a fake.