authoritative - adjective
authoritative - thesaurus
authorised
authorized
classic
classical
definitive
important
Scrabble score = 19
Please note that scrabble only allows seven tiles to be placed at once.
"This is a fantastic opportunity for our students! I'm sure Spellzone will be invaluable in helping them to improve their spellings and therefore improve the quality of their writing in all subject areas!"
Teacher, High School, UK