Question: what are some words that have the prefix uni?
Answer: unicellular. Having only one cell.
unicorn. a horse-like fabled animal that has one horn growing out of the middle of its forehead.
unicycle. a one-wheeled vehicle on which the rider sits and pedals.
unidirectional. moving in only one direction.
unify. ... 
unilateral. ... 
unique. ... 
unison.