Retro-graded means to move backward or to revert to an earlier state. Therefore, the antonyms for retro-graded are words that signify moving forward or progressing. Some of the antonyms for retro-graded include advance, progress, develop, evolve, advance, and proceed. These words basically connote a positive move from the original or previous position to one that is new and improved. Retro-graded is a term that describes something negative or undesirable, while its antonyms connote something positive or desirable. To sum up, the antonyms for retro-graded are words that indicate advancement, growth, and progress.