26 synonyms for slowly such as at a leisurely pace, adagietto, and adagio. Slowly is an adverb, and its antonyms are fast, quickly, and rapidly.
Adagietto, adagio, at a leisurely pace, at a slow pace, at a snail's pace, bit by bit, by degrees, gradually, heavily, in one's own good time, inchmeal, larghetto, largo, leisurely, lento, little by little, ploddingly, slowly but surely, steadily, step by step, taking one's time, unhurriedly, with heavy steps, with leaden steps, and without hurrying.