Interjectional is a term used to describe a word or phrase that is used to express emotion or a sudden utterance. There are several synonyms that can be used instead of interjectional, such as exclamatory, interposing, or ejaculatory. All of these words have a similar meaning and can be used interchangeably in most cases. Some other synonyms for interjectional include outburst, outpouring, and exclamation. Depending on the context, there may be other words or phrases that can replace interjectional, such as sudden or unexpected. Regardless of what word is chosen, the function of an interjectional word or phrase remains the same: to express strong emotions or reactions in a sudden and spontaneous way.