"No end in sight" is an expression that is used to describe a situation that is seemingly endless or that has no clear resolution. However, there are several synonyms that can be used in place of this phrase to convey the same concept. These synonyms include endless, interminable, perpetual, infinite, boundless, never-ending, and unending. Each of these words can be used in different contexts to describe situations that seem to have no end or that may go on indefinitely. By using these synonyms, writers and speakers can add variety and nuance to their language while still conveying the same basic idea.