Words to Describe nonscheduled

Things nonscheduled often describes ("nonscheduled ________")

• operation
• carrier
• cases
• castes
• plan
• drugs
• households
• disabilities
• languages
• rocket
• companies
• caste
• meetings
• injuries
• operations
• hours
• treatment
• service
• passenger
• interview
• downtime
• stops
• stories
• visits
• passages
• flight
• benefits
• activities
• aircraft
• taxis
• population
• airline
• status
• airlines
• basis
• traffic
• carriers
• flights
• flying
• communities
• operators
• passage
• services
• banks
• trains
• events
• interviews
• operator
• items
• areas
• maintenance
• plans
• students
• times
• lines
• workday
• exemption
• aviation
• transportation