I define a cult as an organization that asserts authority over thought and choice, and will not let one leave in peace.
Mormonism is definitely a cult, but I do not know that Swedenborgianism fits this description. I do not believe the tenets of swedenborgianism to be the word of God, but they are not a cult to my knowledge, especially when compared to mormonism.
The THX1138 march continues
Another characteristic of a cult is looking to extra-Biblical revelation and putting it on par with or above Scripture, and measuring Scripture by that instead of the other way around.
Or claiming that there are more paths to God than Jesus, the one of the Bible.
Its a fine line, so how about “heretics” of a feather.