The term "odds and ends" refers to an assortment of miscellaneous items or leftover bits and pieces. Antonyms for this phrase would include words that convey a sense of organization, focus, or intentionality. These could include words like "systematic," "methodical," or "disciplined," which suggest a predetermined plan or order. Alternately, "specific," "precise," or "targeted" would indicate a deliberate focus on particular items or objectives. On the other hand, antonyms could represent a lack of structure or coherence, such as "chaotic," "haphazard," or "unsystematic." Ultimately, the opposite of "odds and ends" would depend on the context in which the phrase is being used.