extremely, exceedingly, excessively, immensely, especially, exceptionally, unusually, extraordinarily, remarkably, uncommonly, extra;

Northern English right;

Scottish unco

informal mega, mucho, seriously, majorly, oh-so

British informal jolly, dead, ever so, well, fair

North American informal real, mighty, awful, plumb, powerful, way

South African informal lekker

informal, dated devilish, frightfully

archaic exceeding