When you hear the phrase "stretch of the imagination," you may be thinking of phrases like unrealistic, far-fetched, or incredible. However, there are many other synonyms that might better express the sense of something being difficult to believe or to accept. Some examples include unimaginable, implausible, unthinkable, and improbable. Other alternatives could include outlandish, fanciful, or even absurd. But no matter the words chosen, the context will ultimately determine which synonym works best. Whether it's for an essay, story, or conversation, finding the perfect word to convey your thoughts is essential to good communication.