* Simple: The wildflowers were clustered around the base of the old oak tree.
* Figurative: Her anxieties clustered in her chest like a flock of agitated birds.
* Technical: The data points clustered tightly together, suggesting a strong correlation.
* Descriptive: The students clustered nervously outside the exam room, their faces etched with anticipation.
* Active Voice: The children clustered around the storyteller, eager to hear the next part of the tale.