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

• sista
• sistas
• sisted
• sister
• sister-chromatid exchange
• sistered
• sisterhood
• sisterhoods
• sister hook
• sister hooks
• sistering
• sister-in-law
• sisterless
• sisterlike
• sisterliness
• sisterlinesses
• sisterly
• sisters
• sisters-in-law
• sisters of mercy
• Sistine
• Sistine Chapel
• sisting
• sistra
• sistrum