Antonyms for minor

all:

major.

insignificant, small:

important, greater, adult, consequential, strong, necessary, big, significant, superior, chief, worthwhile, large, major, useful.

noun:

basic, essential, momentous, distinguished, fateful, primary, worthy, impressive, renowned, unpardonable, prestigious, limitless, prima, acceptable, decisive, worthwhile, first-rate, eminent, greater, meaningful, selected, key, unlimited, higher, overmastering, prime, dominant, overbearing, fundamental, overriding, material, stellar, eventful, premium, prominent, remarkable, choice, valuable, star, better, exceptional, superordinate, select, senior, leading, fatal, distinctive, notorious, illustrious, more, adequate, preeminent, first class, all-important, famous, principal, high-grade, outstanding, starring, sufficient.