substantiate (v.)

• adduce
• affirm
• anatomize
• assay
• atomize
• attest
• authenticate
• back
• body
• bolster
• buttress
• certify
• circumstantiate
• cite
• confirm
• corroborate
• demonstrate
• detail
• document
• embody
• essay
• experiment
• exteriorize
• externalize
• fortify
• incarnate
• incorporate
• instance
• itemize
• justify
• manifest
• materialize
• objectify
• particularize
• personalize
• personify
• probate
• prove
• ratify
• reincarnate
• reinforce
• research
• sample
• specify
• strengthen
• substantialize
• support
• sustain
• taste
• test
• transmigrate
• try
• undergird
• uphold
• validate
• verify
• warrant