Home › Words › D › doubtfulnessdoubtfulnessdoubtfulness means the state or quality of being doubtful; doubt; uncertainty.Among words judged in Lexicurio's Arena, doubtfulness ranks #11,429 of 42,762 for Qualifying.EtymologyFrom Middle English doutefulnesse, dowtefulnesse, equivalent to doubtful + -ness.nounThe state or quality of being doubtful; doubt; uncertainty.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.doubtingness 82% match — The quality of doubting something. vs doubtfulness →doubtability 80% match — Capability of being doubtable. vs doubtfulness →dubiousness 80% match — The state of being dubious or suspicious. vs doubtfulness →dubiosity 77% match — The state or characteristic of being dubious; a dubious assertion. vs doubtfulness →doubtance 77% match — doubt; uncertainty vs doubtfulness →dubitability 76% match — The quality of being dubitable; questionableness. vs doubtfulness →dubiety 74% match — Doubtfulness. vs doubtfulness →dubitancy 73% match — Doubt; uncertainty. vs doubtfulness →