kaiisz

Hello! I just started learning japanese and i was making some flashcards with words from songs i like, since music is my favorite way of learning a new language! I was using some nouns from わらべ唄 (Warabe Uta) from The Tale of Princess Kaguya, because its a very beautiful song. I'm confused about somethig, i was looking up the lyrics and japanese and saw 水車, pronounced in the song as "mizu kuruma", but everywhere else i look up 水車 i just get "suisha"! Can someone explain why this happens? わらべ唄 (Warabe Uta): https://www.youtube.com/watch?v=VBo2rWxvXI8