The quality or state of being feasible; the degree to which something is possible or can realistically be accomplished.
From 'feasible' plus the suffix '-ness,' which converts adjectives into abstract nouns expressing qualities. 'Feasible' comes from Old French 'faisible' (doable), from 'faire' (to do).
While 'feasibility' is the standard term in modern English, 'feasibleness' shows how older English speakers preferred adding '-ness' to create quality nouns—a pattern still alive in words like 'happiness' and 'kindness'!
Complete word intelligence in one call. Free tier — 50 lookups/day.