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

See also: supportive, validate

• hackmatack
• hackney
• hackney carriage
• hackney coach
• hackneyed
• hacksaw
• hackwork
• had best
• had better
• Had crime
• hadal
• haddock
• hade
• Hadean
• Hadean aeon
• Hadean eon
• Hadean time
• Hades
• hadith
• hadj
• hadji
• hadn't
• Hadrian
• Hadrian's Wall
• hadron