"Poles asunder" is a phrase that is often used to describe a situation where two things are completely different from each other and cannot be reconciled. Some synonyms for this phrase include "polar opposites," "diametrically opposed," "worlds apart," "irreconcilable differences," "utterly dissimilar," "incompatible," and "mutually exclusive." These synonyms capture the sense of the original phrase by emphasizing the extreme nature of the contrast between two things. Whether referring to conflicting ideologies, incompatible personalities, or divergent worldviews, these phrases all communicate the same idea: that there is a fundamental and irreconcilable difference that cannot be bridged.