Waveric or waverous attraction is attraction that is fluid. For example, one day one may feel platonic attraction to their friend, the next they may feel romantic attraction, and the day after that they may feel alterous attraction.
Someone who experiences waveric attraction may or may not want a wavership. Though it may be assumed that waveric attraction = wanting wavership, someone who experiences waveric attraction may want a static relationship for whatever reason (for example, finding them complicated).
This was originally coined as attrawaver (link), however I’ve decided to recoin it as waveric attraction to fit the “format” of other tertiary attractions, such as platonic attraction.