1. Serving to support or corroborate
   - collateral, confirmative, confirming, confirmatory, corroborative, corroboratory, substantiating, substantiative, validating, verificatory, verifying

See also: supportive, validate

• drop one's serve
• drop open
• drop press
• drop scone
• drop shot
• drop the ball
• drop zone
• drop-dead
• drop-down menu
• drop-leaf
• drop-leaf table
• drop-off charge
• dropforge
• dropkick
• dropkicker
• droplet
• dropline
• dropout
• dropped egg
• dropper
• dropping
• dropping zone
• droppings
• dropseed
• dropsical