General:
* Copy: This is a straightforward synonym for imitation.
* Replication: This implies a more precise and faithful reproduction.
* Emulation: This suggests trying to equal or surpass the original.
* Mimicry: This emphasizes the close resemblance to the original.
* Parody: This implies a humorous or satirical imitation.
* Simulation: This refers to the creation of a model or representation of something.
* Reproduction: This emphasizes the creation of a copy of something.
* Counterfeit: This implies a false or fraudulent imitation.
More specific:
* Aping: This suggests a less skillful or slavish imitation.
* Echoing: This suggests a repetition of something that was said or done.
* Following: This suggests copying someone's actions or behavior.
* Modeling: This implies using something as an example to be copied.
* Duplicating: This emphasizes the exact replication of something.
* Forgery: This refers to the creation of a false copy of something, often with the intent to deceive.
The best word to use will depend on the specific context.