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

See also: supportive, verify

• ultranationalistic
• ultrasonic
• ultrasonically
• ultrasonics
• ultrasonography
• ultrasound
• Ultrasuede
• ultraviolet
• ultraviolet illumination
• ultraviolet lamp
• ultraviolet light
• ultraviolet radiation
• ultraviolet source
• ultraviolet spectrum
• Ulugh Muztagh
• ululant
• ululate
• ululation
• Ulva
• Ulvaceae
• Ulvales
• Ulvophyceae
• Ulysses
• Ulysses Grant
• Ulysses S. Grant