interrex /inˈtər-reks/

1. Someone who rules during an interregnum
2. A regent

• perpetualists
• perpetualities
• perpetuality
• perpetually
• perpetual motion
• perpetual-motionist
• perpetual-motionists
• perpetuals
• perpetual screw
• perpetual screws
• perpetuance
• perpetuances
• perpetuate
• perpetuated
• perpetuates
• perpetuating
• night-chairs
• night-churr
• night-churrs
• nightclass
• nightclasses
• nightclothes
• night-cloud
• night-clouds
• nightclub