A Great Degree

Antonyms for a great degree:

secondarily, trivially.

Synonyms for a great degree:

principally (adverb)

above all, basically, chiefly, dominantly, eminently, especially, essentially, first and foremost, first of all, for the most part, fundamentally, generally, importantly, in the first place, in the main, largely, materially, mostly, notably, particularly, peculiarly, predominantly, preeminently, primarily, substantially, superlatively, supremely, universally, vitally, Prevailingly, Prevalently, cardinally, before anything else, to a great degree.