Unsubscribing is commonly used when one wants to opt-out of a certain service or mailing list. However, there are many other synonyms that can be used instead. For instance, one can use the term "cancelling" to express the same meaning. Other alternatives include "removing," "withdrawal," "secession," and "termination." All of these words can be used interchangeably depending on the context, and their usage makes communication more effective and diverse. In conclusion, using synonyms for common words and phrases enhances a person's vocabulary and allows for more clarity and comprehension when communicating with others.