adjective

of an extent, amount, or intensity considerably above average.

the article was of great interest

considerable,substantial,pronounced,sizeable,significant,appreciable,serious,exceptional,inordinate,extraordinary,special,large,big,extensive,expansive,broad,wide,ample,spacious,vast,immense,huge,enormous,gigantic,massive,colossal,mammoth,monstrous,prodigious,tremendous,stupendous,unlimited,boundless,cosmic,humongous,whopping,whopping great,thumping,thumping great,dirty great,whacking,whacking great,ginormous