Write two to three sentences about the effect (what the poet trying to express) by the poems use of rhythm and rhyme.
I most contexts, no. It can be considered an error if viewed from a programmer's perspective, because a bug is viewed as an error in the code of a program. If it is not viewed from a similar perspective, then it is not a synonym. Thesaurus.com can be a helpful place for you.
Panic would give you extreme fear to the point where you're frozen.