The phrase "made as one goes along" refers to something that is created or done improvisationally, without a plan or blueprint. There are several synonyms for this phrase, including "ad-lib," "spontaneous," "impromptu," "off-the-cuff," and "on the fly." Other possible synonyms include "unplanned," "unrehearsed," "unscripted," and "unprepared." These words all convey the idea of something that is created in the moment, without premeditation or prior knowledge. Whether you are talking about a piece of music, a work of art, or a speech, these synonyms capture the essence of something that is produced in the heat of the moment and reflects the creative spark of the person making it.