課題【かだい】
subject, theme, issue, matter, homework, assignment, task, challenge, problem, question
議題【ぎだい】
topic of discussion, agenda
題材【だいざい】
subject, theme
主題【しゅだい】
subject, theme, motif
題名【だいめい】
title, caption, heading
宿題【しゅくだい】
homework, assignment, pending issue, unresolved problem, open question
題【だい】
title, subject, theme, topic, problem (on a test), question, counter for questions (on a test)
出題【しゅつだい】
setting a question (for an exam, quiz, etc.), setting a theme (for composition of poetry)