"Chuck away" is a phrasal verb that means to throw away something that is no longer needed or useful. For those who want to add variety to their vocabulary, there are several synonymous expressions that can be used in place of "chuck away". "Discard" is a formal synonym and suggests the act of getting rid of something that is no longer necessary. "Dispose of" is another formal expression similar to "discard", while "get rid of" is a more casual alternative that conveys the same meaning. Other synonyms include "toss out", "ditch", "throw out", and "jettison". Using synonyms such as these can help make writing and speaking more interesting and varied.