13 letters
- cunningnesses23
- curablenesses22
- curiousnesses19
- currentnesses19
- cursivenesses22
- cursorinesses18
- customariness21
- cybernetician26
- cyberneticist25
- cyclohexanone33
- cyclopropanes29
- cyclosporines26
- cytogenetical25
- cytomembranes28
- dangerousness19
- darlingnesses19
- dastardliness17
- dauntlessness18
- deathlessness18
- deceitfulness23
- deceptiveness25
- decidednesses20
- deciduousness21
- deconditioned21
- defectiveness25
- defenestrated19
- defenestrates18
- defensiveness23
- degenerations18
- deliciousness20
- delightedness21
- deliriousness17
- demagnetizers29
- demagnetizing32
- demandingness23
- demimondaines23
- demineralized29
- demineralizer28
- demineralizes28
- desirableness19
- desperateness18
- destituteness16
- desultoriness17
- dethronements21
- deviousnesses20
- devotednesses20
- dexamethasone27
- dexterousness23
- diamagnetisms23
- diaphaneities20
- differentness22
- diffusenesses22
- diffusiveness26
- diphenylamine27
- disconnecting25
- disconnection23
- disillusioned19
- disparateness18
- dissoluteness17
- distantnesses16
- diversenesses19
- dividednesses21
- doggishnesses21
- dolefulnesses21
- dollishnesses19
- doltishnesses18
- domineeringly24
- donnishnesses19
- doubtlessness20
- doughtinesses20
- downrightness23
- dreamlessness19
- drunkennesses22
- dryopithecine25
- dubiousnesses20
- durablenesses20
- dutifulnesses21
- earnestnesses15
- earthlinesses17
- easygoingness21
- educationeses19
- effectiveness27
- effectualness25
- effortfulness25
- eggheadedness22
- egregiousness19
- elaborateness18
- elderlinesses17
- electioneered19
- electioneerer18
- electromagnet23
- elusivenesses20
- embryogeneses24
- embryogenesis24
- embryogenetic27
- emulousnesses20
- endlessnesses17
- energetically23
- energizations26
- enjoyableness30
- enshrinements21
- enthronements21
- entrepreneurs19
- enviousnesses20
- equablenesses28
- equestriennes25
- equitableness28
- equivocalness32
- erosivenesses18
- erroneousness16
- essentialness16
- estimableness21
- eternalnesses16
- ethanolamines21
- ethicalnesses20
- ethylbenzenes32
- eugeosyncline24
- evasivenesses22
- evocativeness25
- excessiveness28
- excitableness28
- exclusiveness30
- excursiveness29
- excusableness29
- execrableness28
- exemplariness28
- exhibitioners26
- expansiveness29
- expensiveness29
- explosiveness29
- exponentially29
- exquisiteness31
- extensiveness26
- extremenesses24
- facetiousness21
- factualnesses22
- faddishnesses21
- faithlessness20
- fanaticalness22
- fatefulnesses22
- fatheadedness21
- fatuousnesses19
- faultlessness20
- favorableness25
- fearfulnesses22
- feelingnesses21
- feloniousness20
- fencelessness22
- fenestrations18
- ferociousness21
- ferrimagnetic25
- ferromagnetic25
- fertilenesses18
- festivenesses21
- fictioneering23
- fictivenesses24
- fidgetinesses20
- finicalnesses22
- finickinesses25
- fittingnesses20
- flightinesses22
- flowerinesses21
- fluphenazines34
- folkishnesses24
- foolhardiness21
- foolishnesses20
- foppishnesses25
- foreignnesses20
- foreshortened20
- forevernesses21
- forgetfulness24
- forgivenesses23
- forgivingness26
- forlornnesses19
- fortunateness19
- fortuneteller20
- forwardnesses21
- fractiousness21
- franticnesses21
- fretfulnesses22
- frightfulness26
- frivolousness23
- frontogeneses20
- frontogenesis20
- frowardnesses21
- fruitlessness19
- fulsomenesses22
- furazolidones29
- furtivenesses22
- gainfulnesses22
- galactosamine23
- gametogeneses21
- gametogenesis21
- garnetiferous20
- garrulousness19
- gaseousnesses17
- gastrocnemius23
- gawkishnesses25
- generalissimo20
- generalizable30