Synonyms for Certify

Warrant
certify charter empower	enable enfranchise entitle	franchise legalize ratify	sanction validate warrant

Assure
annex ascertain assure attest bring home to certify	cinch clear up clinch decide determine	ensure establish find out get at insure	nail down reassure satisfy see sort out

Avouch
accredit acknowledge admit affirm allege announce approve argue assert asseverate assure attest	aver avouch avow bear witness certify confess contend declare depose disclose enunciate have	insist lay down maintain predicate proclaim profess pronounce protest put say set down speak	speak out speak up stand for stand on state submit swear testify vouch vow

Reinforce
animate around arouse ascend authenticate authorize back up bandage bankroll bear out bear up beef up bolster brace brace up brighten buck up buoy up buttress certify circumstantiate confirm continue corroborate cradle crutch document elate	electrify embolden encourage endure energize enliven excite exhilarate fillip finance fortify freshen fund galvanize gird give a lift gladden gratify hang on harden hearten impel inspire inspirit intensify invigorate jazz up justify	keep alive keep at it keep going keep on keep up lengthen liven mainstay nerve nick perk up permit perpetuate persevere persist pick up pillow possess probate prolong prop protract prove provoke quicken ratify reassure refresh	regale reinforce rejoice renew retain rouse sharpen shore shore up steel stiffen stimulate strengthen subsidize substantiate subvention toughen undergird underlie uphold upkeep validate verify vitalize vivify whet