Related Clues:

• Certify (to)
• Strongly assert
• Affirm with certainty
• Bear witness (to)
• Hold as true
• State with firmness
• Profess as true
• State unwaveringly
• Warrant, with 'to'
• Affirm with confidence
• Say and mean
• Vera could declare to be true
• State firmly, declare
• A writer's exaggeration
• Give evidence - sounds a trial