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

See also: supportive, validate

• dead air
• dead axle
• dead body
• dead center
• dead centre
• dead drop
• dead duck
• dead hand
• dead hand of the past
• dead heat
• dead language
• dead letter
• dead load
• dead mail
• dead march
• dead metaphor
• dead nettle
• dead on target
• dead person
• dead reckoning
• dead ringer
• dead room
• Dead Sea
• Dead Sea scrolls
• dead set