The phrase "is straight" refers to something being aligned in a direct and linear manner. Some synonyms for this phrase include "is level," "is even," "is upright," and "is perpendicular." Additionally, other words that can convey a similar meaning include "is true," "is accurate," "is proper," and "is rightful." These words all suggest a sense of correctness, accuracy, and honesty. Whether used to describe an object's position or to convey that something is correct or fair, these synonyms for "is straight" can help to add depth and clarity to any expression or message.