See certify
certifying - verb
certifying - thesaurus
attest
demonstrate
endorse
evidence
indorse
licence
license
manifest
Scrabble score = 19
Please note that scrabble only allows seven tiles to be placed at once.
"Spellzone is incredibly easy to access and caters for a wide range of abilities, which means you can use it throughout the school at a range of levels, making it fantastic value for money as a learning resource."
Anne Shisler, SENCO, City of London School for Girls