• 夢ゆめ — dream
• 悪夢あくむ — nightmare
• 夢中むちゅう — being absorbed in, daze
• 夢想むそう — fantasy, daydream
• 夢見ゆめみ — dreaming, seeing a dream
• 夢幻むげん — dreamlike, illusion

The top of the kanji 夢 suggests someone sleeping under a roof, while the bottom includes 夕 (evening). This reflects the idea of dreams occurring at night. It also conveys the ephemeral nature of dreams and illusions.

こどもの頃ころの夢ゆめは 宇宙飛行士うちゅうひこうしになることでした。
My childhood dream was to become an astronaut.

昨夜さくやは 変へんな 夢ゆめを見みました。
I had a strange dream last night.

The on-yomi ム (mu) and ボウ (bou) are used in compound words like 夢想 or 夢幻. The kun-yomi ゆめ is used in standalone and native expressions such as 夢を見る or 夢がかなう.