1. One and a half

Encyclopedia: Sesqui-

• UNICEF
• unicellular
• Unicode
• unicorn
• unicorn root
• unicuspid
• unicycle
• unicyclist
• unidentifiable
• unidentified
• unidentified flying object
• unidimensional
• unidirectional
• unifacial
• unification
• Unification Church
• unified
• unifier
• unifilar
• unifoliate
• uniform
• uniform resource locator
• uniformed
• uniformise
• uniformitarianism