Fake 假的；冒充的；偽造的
Experts revealed that the painting was a fake.
專家揭露了這幅畫是假的。

Knock off 假貨
Is that the real thing or a knock-off?
這是真品還是假的？

Counterfeit 假貨，冒牌
All the jewerely she sold was counterfeit.
她賣的珠寶都是假貨。

Bogus 假的；偽造的
She produced some bogus documents to support her claim.
她偽造了假文書來證明自己。

Phony 假的；冒充的；欺騙的
She's such a phony. You can't believe aword she says.
她很假的。你不能相信她說的任何一個字。

Pseudo- 假的；偽的；冒牌的
You shouldn't buy their products. It's all based on psuedo-science.
你不應該買他們的產品。（他們的產品）都是偽科學。

Copycat （尤為兒童用語，指無主見的）模仿者，抄襲者，好跟人學的人
Wig 假發
Dentures 假牙