major

Synonyms: above better big chief considerable dominant elder exceeding extensive extreme greater hefty higher large larger large-scale leading main most oversized primary senior sizable superior supreme ultra upper uppermost

Antonyms: lesser little minor small

Synonyms: big chief critical crucial dangerous grave great grievous heavyweight influential life and death main major-league meaningful notable outstanding overshadowing preeminent principal radical serious significant star stellar top vital weighty

Antonyms: insignificant minor unimportant