民主【みんしゅ】
democracy, popular sovereignty, Democratic Party (esp. DPJ)
喪主【もしゅ】
chief mourner
主婦【しゅふ】
housewife, mistress (of the house), homemaker
主張【しゅちょう】
claim, insistence, assertion, advocacy, emphasis, contention, opinion, tenet
主要【しゅよう】
chief, main, principal, major
主催【しゅさい】
sponsorship (i.e. conducting under one's auspices), promotion, organizing, organising, hosting, staging
主義【しゅぎ】
doctrine, rule, principle, -ism
主席【しゅせき】
head, chief, chairman, governor, president, top student, head of the class, top seat, first desk (in orchestra)
株主【かぶぬし】
shareholder, stockholder
自主【じしゅ】
independence, autonomy, self-reliance
民主主義【みんしゅしゅぎ】
democracy
主導【しゅどう】
leadership, initiative, spearhead
主権【しゅけん】
sovereignty, supremacy, dominion
主体【しゅたい】
main constituent, core, nucleus, subject (philosophical), protagonist
主役【しゅやく】
leading part, leading actor, leading actress
主人【しゅじん】
head (of a household), proprietor (of a store), proprietress, landlord, landlady, one's husband, (one's) employer, (one's) master, host, hostess
主任【しゅにん】
person in charge, senior staff, manager, chief, head
主人公【しゅじんこう】
protagonist, main character, hero, heroine, head (of a household), proprietor (of a store)
主に【おもに】
mainly, primarily
主演【しゅえん】
starring (in a film, play, etc.), playing the leading part