sponsion /sponˈshən/

1. The act of becoming surety for another
2. An agreement or promise made on behalf of another, esp by an individual on behalf of his or her government

sponˈsional adjective

• arbitress
• arbitrium
• arbitriums
• arblast
• arblaster
• arblasters
• arblasts
• arbor
• arboraceous
• Arbor Day
• arboreal
• arboreous
• arbores
• arborescence
• arborescences
• arborescent
• arboret
• arboreta
• arborets
• arboretum
• arboricultural
• arboriculture
• arboricultures
• arboriculturist
• arboriculturists