The phrase "in series" is often used when referring to objects or events that occur sequentially or one after the other. Some synonyms for "in series" include consecutively, sequentially, successively, and in order. "Consecutively" specifically implies that events or objects occur without interruption, whereas "successively" and "in order" suggest a specific arrangement or pattern. Other synonyms include "one by one," "progressively," and "gradually." In technical contexts, "serially" is a commonly used synonym as well. Regardless of the specific synonym used, all convey the idea of items or events unfolding in a specific order or sequence.