"Deny thy father and refuse thy name, or if thou shall not be but sworn my love and I will no longer be a Capulet" this shows that Juliette would do anything for love
Assuming you are talking about Homonyms, it is when two or more words look and sound the same but mean two different things. Some examples include,
Two, and Too. One is the number 2 and the other means as well.
Witch, and Which. One is a fictional species and the other is a word for comparing two things.
Yes, in Chapter 1 the rose bush represents that even though the prison is a cold and dark place, beauty can still be found. In Chapter 7, the rose bush is the only beautiful thing in the garden, which alludes to the same message as that in chapter 1.