What is another word for boycott?

Here are some words that can be used as synonyms for "boycott":

General:

* Refusal

* Rejection

* Sanction

* Embargo

* Ban

* Prohibition

* Denial

* Blacklist

* Shun

* Exclude

* Isolate

More specific:

* Strike (when referring to labor disputes)

* Withdrawal (when referring to a group's withdrawal of support)

* Noncooperation

* Passive resistance

The best synonym for "boycott" will depend on the specific context and the nuance you wish to convey.