12 letters
- listlessness15
- literariness14
- literateness14
- liverishness20
- lonesomeness18
- longsomeness20
- lopsidedness19
- lovelessness19
- lovelornness20
- lovesickness25
- lubberliness22
- lukewarmness25
- luminousness20
- lusciousness19
- lustrousness16
- maidenliness19
- malapertness20
- manifoldness22
- mannerliness19
- masterliness17
- materialness17
- mercifulness24
- militantness18
- mindlessness19
- mirthfulness23
- moderateness17
- motherliness19
- mournfulness23
- movelessness21
- mutinousness19
- namelessness18
- nauseousness16
- nebulousness20
- needlessness16
- negativeness20
- neutrinoless16
- nevertheless20
- numerousness19
- numinousness20
- obdurateness18
- obligingness22
- obsoleteness17
- operatorless16
- oppositeness19
- ordinariness15
- outdatedness16
- outgoingness19
- outsiderness15
- overcompress25
- painlessness18
- palatialness18
- pastoralness17
- pathlessness19
- peacefulness24
- perilousness18
- perverseness20
- perviousness21
- physicalness24
- pitiableness20
- pitilessness17
- planlessness19
- pleasantness18
- pleasingness20
- pleasureless18
- plotlessness18
- poeticalness20
- populousness22
- positiveness20
- postmistress18
- prankishness23
- preciousness20
- preparedness20
- pressureless17
- previousness21
- pridefulness22
- priestliness17
- priggishness22
- princeliness21
- profoundness22
- prolificness23
- propertyless21
- proprietress18
- provableness24
- punitiveness22
- purblindness23
- qualmishness29
- questionless24
- rationalness15
- ravenousness19
- reactiveness20
- readableness18
- recklessness21
- reliableness18
- religionless17
- reservedness18
- resignedness17
- resoluteness15
- restlessness14
- retiringness16
- rightfulness22
- rigorousness16
- rootlessness14
- ruthlessness17
- salutariness15
- sanguineness18
- scabrousness20
- scornfulness22
- scratchiness21
- seamlessness17
- secludedness20
- sedulousness17
- selflessness18
- selfsameness20
- semidarkness21
- sensibleness18
- sensuousness16
- separateness16
- shamefulness23
- sheepishness20
- shrewishness20
- sinisterness14
- skillessness19
- skillfulness24
- skittishness19
- slipperiness20
- slothfulness21
- slovenliness20
- sluggardness20
- sluggishness21
- sluttishness17
- snappishness22
- sniffishness22
- snobbishness22
- sociableness20
- solitariness14
- sonorousness15
- soothingness18
- soullessness16
- southernness17
- spaciousness20
- speciousness20
- spiritedness17
- spitefulness21
- splendidness20
- sportfulness21
- sportiveness20
- spotlessness17
- spuriousness18
- squarishness25
- stalwartness17
- standardless16
- stealthiness16
- sterlingness17
- straightness17
- strandedness16
- stubbornness21
- studiousness16
- succinctness24
- suitableness18
- superexpress26
- suspenseless18
- swainishness19
- sweaterdress16
- sweepingness22
- tactlessness17
- tangibleness20
- taskmistress19
- tastefulness18
- terribleness17
- thankfulness25
- thievishness21
- thinkingness23
- thoroughness20
- ticklishness23
- tigerishness17
- timelessness17
- timorousness17
- tirelessness14
- tiresomeness16
- togetherness17
- toilsomeness17
- tonelessness15
- toploftiness20
- tortuousness15
- towardliness18
- tranquilness25
- trickishness22
- tristfulness18
- trustfulness19
- trustingness17
- truthfulness21
- ultimateness18
- unbiasedness19
- unchasteness20
- uncommonness25
- unctuousness20
- ungainliness19
- unkindliness22
- unlawfulness24
- unlikeliness21