What is the difference between an anti-slavery advocate and abolitionist?

While Anti-Slavery advocates could hide behind a multiplicity of different views, the Abolitionist movement stood on the moral high-ground, viewing slavery as an inexcusable sin. Their arguments and position was polarizing and non-negotiable, ultimately only to be resolved by civil war.

Answer: The main differences between an anti-slavery advocate and abolitionist is that anti-slavery advocates contained the belief that slavery was is wrong, while abolitionists actually had plans and steps to end slavery or halt its growth.