The phrase "be parallel" refers to two or more lines or elements that run alongside each other without intersecting. Synonyms for this phrase include "run parallel," "go hand in hand," "correspond," "run side by side," "go alongside," "be equal," "be similar," and "be comparable." These synonyms indicate that two or more objects are aligned in the same direction or share a similar trait. Additionally, these synonyms can be used in a variety of contexts, including math, science, art, and language. Overall, using synonyms for the phrase "be parallel" can help writers and speakers add variety and clarity to their communication.