important, significant / grave, solemn

homework

a university; a college

(collective) brothers / (collective, by extension) siblings / (collective, by extension) brothers and sisters; brethren (brotherhood; fellowship)

almost the same, not much difference

being practically the same

love (in both senses of loving a friend or family member and a partner romantically) / very (most) favorite

(shogi) the great stag, a piece in 大局将棋 (taikyoku shogi, a huge chess variant, played on a 36×36 grid)

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

a lighthouse