3D Hair 
Spike
Short
Long
Curly
Wavy
Ponytail
Bun
Bald
Braid/ Dreadlock
Afro
Band 
Hairstyle
​

Examples
They have spike hair. (3D Hair Spike) 
I see this person has short hair. (3D Hair Short) 
This person has stylish big hair. (3D Hairstyle)