Creed, Encyclical, Decretal, Canon, Bull, etc - What's the difference?

In Catholicism, what is the difference between a [Creed](https://en.wikipedia.org/wiki/First_Council_of_Nicaea#Nicene_Creed) , an [Encyclical](https://en.wikipedia.org/wiki/Encyclical) , a [Decretal](https://en.wikipedia.org/wiki/Decretal) , a [Canon](https://en.wikipedia.org/wiki/Council_of_Laodicea#Biblical_canon) and a [Papal Bull](https://en.wikipedia.org/wiki/Papal_bull) ? Are there any other decrees or formal or informal outlines of official church doctrine used by the Catholic church and are any excluded from or exclusively used for inerrant revelation from God by the Pope?