As nouns the difference between venom and hulk
is that
venom is a poison carried by an animal, usually injected into an enemy or prey by biting or stinging; atter while
hulk is a person resembling, especially physically, the hulk in the marvel comics universe.
As a verb venom
is to infect with venom; to envenom; to poison.
As a proper noun hulk is
(comics) a fictional comic-book character who gains superhuman strength when he becomes angry.