Zip Up is a phrasal verb used in a variety of contexts that all involve fastening, securing or closing something with a zipper. There are several synonyms for this phrasal verb that can be used interchangeably to diversify the language or avoid repetition. Some of the synonyms include zipper up, close up, fasten up, cinch up, pull up and seal up. These synonyms can be used in different contexts depending on the situation the writer or speaker is describing. The use of synonyms adds depth and variety to the language and helps to convey the intended meaning more clearly.