Pagan and Voodoo are both quite broad categories of religion. Wicca and Hoodoo are more specific; Wicca being a variety of Paganism and Hoodoo a variety of Voodoo.
Pagan is from the west and middle east, it was created by the monotheists as an umbrella term to cover all the polytheistic faiths as a contrast to monotheism, including ancient and modern types such as Wicca.
Voodoo is a group of African and African-diaspora faiths of which Hoodoo is one created by African Slaves in America.
https://en.wikipedia.org/wiki/Voodoo
https://en.wikipedia.org/wiki/Paganism