insole /inˈsōl/

1. The inner sole of a boot or shoe
2. A sole of some material placed inside a shoe for warmth, dryness or comfort

• back-blockers
• back-blocks
• backboard
• backboards
• back boiler
• back boilers
• backbond
• backbone
• backboned
• backboneless
• backbones
• backbreaker
• backbreakers
• backbreaking
• back burner
• back-burner
• back burners
• back-calculate
• back-calculated
• back-calculates
• back-calculating
• back-calculation
• backcast
• backcasting
• backcasts