Dual Meaning of Some Lyrics

I love anime, especially their songs. I see that some songs assign alternate pronunciations for some kanjis like this:

<紅蓮の弓矢>: 迸る[殺意](しょうどう)に　其の身を焼きながら

<START!! True Dreams>: いつか僕らもなりたいよ　輝く[最光星](スーパースター)

I also see this used outside of lyrics, like this episode title:

ラブライブ！虹ヶ咲学園スクールアイドル同好会第13話: [みんなの夢を叶える場所](スクールアイドルフェスティバル)

I get that this is to assign a dual meaning to the term, but I’d like to know if there’s a name for this technique and where can I learn more about it.