The word "more inconstantly" is typically used to describe inconsistency or irregularity. Some synonyms for this phrase include "less predictably," "with greater variability," or "more erratically." Other possible alternatives include "unevenly," "intermittently," or "unsteadily." Essentially, any word or phrase that implies a lack of consistency or dependability can be considered a synonym for "more inconstantly." These terms can be useful for writers who wish to add variety and nuance to their descriptions of behavior or patterns over time, or to describe complex situations where consistency or reliability are not present.