Legal age, (main) body, adulthood, and coming of age are all synonyms for majority. Minority and few are antonyms of majority. And here are 26 another word for majority.
(main) body, (the) people, best/better part, bulk, generality, greater part/number, larger part/number, lion's share, main part, major part, mass, more than half, most, predominance, preponderance, the masses, weight, and the silent majority are all synonyms for majority.
Adulthood, coming of age, legal age, manhood/womanhood, maturity, seniority, and age of consent are all another word for majority.
Majority synonym page has a variety of synonyms that differ in length. 3 synonyms with 4 letters and 1 synonym with 6, 11, 13, 14, and 17 letters. 4 synonyms with 8 letters and 5 synonyms with 9 letters.
2 synonyms with 10, 12, and 16 letters. For a total of 23 another word for majority.
The majority voted for the proposal.
A majority of students passed.
The majority opinion swayed decisions.
The majority favored a different option.