balsa /bölˈsə or balˈsə/

1. Corkwood, a tropical American tree (Ochroma lagopus) of the family Bombacaceae, with very light wood (also balˈsawood)
2. A raft or float

• risers
• rises
• rise to it
• rise to the bait
• rise to the occasion
• rishi
• rishis
• risibilities
• risibility
• risible
• risibly
• rising
• rising damp
• risings
• rising tide
• rising tides
• risk
• risk analysis
• risk assessment
• risk-averse
• risk capital
• risked
• risker
• riskers
• risk factor