Appearance/Characteristics:
* Zany: (adj.) eccentric, funny, and unpredictable
* Zealous: (adj.) having or showing great enthusiasm and fervor
* Zippy: (adj.) lively, energetic, and fast
* Zesty: (adj.) having a lively, tangy, or spicy flavor
* Zigzag: (adj.) having a series of sharp turns or angles
* Zephyr: (n.) a gentle breeze
Feelings/Emotions:
* Zen: (n.) a state of calm, peaceful awareness
* Zealous: (adj.) intensely enthusiastic or passionate
Sound:
* Zest: (n.) a lively or tangy quality, often referring to a sound
Other:
* Zenith: (n.) the highest point reached by something
* Zone: (n.) a specific area or region
* Zoom: (v.) to move quickly or rapidly
Let me know if you have a specific category in mind, and I can provide more tailored options!