The quality or state of being full of change; the characteristic of being marked by frequent alterations and variations.
From 'changeful' plus '-ness' suffix. This double-suffix formation (change + full + ness) creates a philosophical noun expressing the abstract concept of being full of change.
Some noun formations feel redundant—'changefulness' and 'changeability' express almost identical concepts, yet both existed in 18th-century writing, showing how authors tried different suffix combinations to find what sounded best, only gradually standardizing on preferred forms.
Complete word intelligence in one call. Free tier — 50 lookups/day.