back up,
back make a copy of (a computer file) especially for storage in another place as a security copy; "You'd better back up these files!"
vouch give supporting evidence; "He vouched his words by his deeds"
verify confirm the truth of; "Please verify that the doors are closed"; "verify a claim"
shew,
demonstrate,
establish,
prove,
show march in protest; take part in a demonstration; "Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle"
document support or supply with references; "Can you document your claims?"
validate make valid or confirm the validity of; "validate a ticket"
confirm -
strengthen or make more firm; "The witnesses confirmed the victim's account"
affirm to declare or affirm solemnly and formally as true; "Before God I swear I am innocent"
uphold,
maintain stand up for; stick up for; of causes, principles, or ideals
warrant,
justify adjust the spaces between words; "justify the margins"
verify confirm the truth of; "Please verify that the doors are closed"; "verify a claim"
corroborate,
validate support with evidence or authority or make more certain or confirm; "The stories and claims were born out by the evidence"
reconfirm confirm again; "You must reconfirm your flight reservations"
confirm -
administer the rite of confirmation to; "the children were confirmed in their mother's faith"
covenant enter into a covenant or formal agreement; "They covenanted with Judas for 30 pieces of silver"; "The nations covenanted to fight terrorism around the world"
organized religion,
religion,
faith a strong belief in a supernatural power or powers that control human destiny; "he lost his faith but not his morality"
confirm -
support a person for a position; "The Senate confirmed the President's candidate for Secretary of Defense"