Hair:
* Curly hair
* Curly locks
* Curly tresses
* Curly mane
* Curly fuzz
Other:
* Curly fries
* Curly leaves
* Curly tendrils
* Curly horns
* Curly whiskers
* Curly tail
* Curly patterns
Figurative:
* Curly thoughts
* Curly lines
* Curly path
* Curly journey
These are just a few examples, and the specific noun that works best will depend on the context.