Postmodifiers are words that are used to modify, or provide additional information about, the main phrase that they follow. There are many synonyms for postmodifier, including modifier, qualifier, addendum, supplement, addition, adjunct, appendage, and attachment. Each of these words can be used interchangeably to describe the same function of adding more information to the main phrase. Postmodifiers can be either adjectives or adverbs, and they come after the phrase they are modifying. Understanding the different synonyms for postmodifier can help you communicate more clearly and effectively when discussing language and grammar.