When it comes to expressing the idea of making something perpendicular, there are several synonyms that can be used. These include the words "square," "align," "level," "upright," and "perpendicularize." Each of these words convey the concept of making an object or surface straight and at a 90-degree angle to another surface. Using synonyms can be useful for adding variety to your writing or speech, or for clarifying your message for a particular audience or situation. By exploring different synonyms for the word "make perpendicular," you can deepen your understanding of its meaning and broaden your vocabulary.