interregnum /in-tər-regˈnəm/

1. The time between two reigns
2. The time between the cessation of one and the establishment of another government
3. Any breach of continuity in order, etc

• ureas
• uredia
• Uredinales
• uredine
• Uredineae
• uredines
• uredinia
• uredinial
• urediniospore
• urediniospores
• uredinium
• uredinous
• urediospore
• urediospores
• uredium
• uredo
• uredosori
• uredosorus
• uredospore
• uredospores
• uredo-stage
• ureic
• ureide
• ureides
• uremia