Here are some other terms that describe people with a strong interest in something:
* Avid: This implies a strong and consistent interest.
* Passionate: This suggests a deep emotional connection to the activity.
* Devoted: This emphasizes a strong commitment to the activity.
* Fanatic: This term can be used for someone with an extreme or obsessive interest.
* Addict: This indicates a strong compulsion to engage in the activity.
* Buff: This is a more informal term, often used for someone who is knowledgeable and enthusiastic about a particular subject.
The best term to use depends on the specific context and the level of interest you want to convey.