19 synonyms for priority such as greater importance, first concern, and first/highest place. Priority is a noun, and its antonyms are triviality and neglect.
First concern, first/highest place, greater importance, matter of greatest importance, most important consideration, most pressing matter, pre-eminence, precedence, precedency, predominance, preference, primacy, primary issue, prime concern, the lead, weight, weightage, and weighting.