Directly related:
* Actively: adverb (in an active way)
* Activation: noun (the process of becoming active)
* Activator: noun (something that makes something active)
* Activist: noun (a person who actively works to bring about political or social change)
* Activity: noun (something that a person does)
Related through prefixes and suffixes:
* Inactive: adjective (not active)
* Reactivate: verb (to make active again)
* Overactive: adjective (excessively active)
* Reactive: adjective (responding to a stimulus)
* Interactivity: noun (the quality of being interactive)
* Activeness: noun (the state of being active)
Words with similar meaning:
* Energetic: adjective (full of energy)
* Vigorous: adjective (strong and healthy)
* Dynamic: adjective (characterized by constant change and activity)
* Lively: adjective (full of life and energy)
This list is not exhaustive, and there are many other words related to "active" depending on the specific context and usage.