When it comes to expressing a relationship or connection between two things, the phrase "relative to" is commonly used. However, there are several synonyms for this phrase that can be used interchangeably, such as in comparison to, in proportion to, in relation to, and with regards to. These phrases all convey the same meaning of a relationship or comparison between two or more things. The choice of which phrase to use will depend on the specific context and tone of the sentence, as well as the writer's personal preference. Nonetheless, knowing the several synonyms of "relative to" can enhance one's writing and provide variety to sentences.