宗教【しゅうきょう】
religion, religious affiliation, belief, faith, creed, religious activity
宗門【しゅうもん】
(religious) denomination, sect
宗派【しゅうは】
sect, denomination, school (e.g. of poetry)
宗家【そうけ】
head of family, originator
禅宗【ぜんしゅう】
Zen (Buddhism)
宗祖【しゅうそ】
sect founder
改宗【かいしゅう】
religious conversion