Formal:
* Ringlets: This is a classic and elegant word for curly locks.
* Spirals: This is a more scientific term, but it can be used to describe the shape of the curl.
* Tresses: This word can refer to any kind of hair, but it often implies a thick, luxurious mane.
Informal:
* Curls: This is a simple and straightforward word.
* Twirls: This word suggests a playful and carefree style.
* Coils: This word is similar to "spirals," but it implies a tighter curl.
* Wisps: This word suggests delicate and fine curls.
Other options:
* Waves: This word can be used if the hair is loosely curled.
* Frizz: This word is often used to describe unruly curls.
The best word to use will depend on the specific context and the desired effect.