15 letters
- confidingnesses27
- configurational27
- confirmednesses27
- confraternities23
- confrontational25
- conglomerations26
- conglutinations25
- congratulations24
- congressionally26
- conjugationally36
- conjunctionally38
- connaturalities22
- connoisseurship26
- consanguinities24
- conscientiously27
- consciousnesses24
- consecutiveness28
- consequentially34
- conservationist24
- conservatorship28
- considerateness21
- conspicuousness28
- constitutionals22
- constructionist24
- constructivisms30
- constructivists27
- consultantships27
- containerboards24
- contemplatively33
- contemporaneity28
- contemptibility31
- contentiousness22
- contextualizing40
- contortionistic23
- contractibility28
- contractilities23
- contradictories23
- contradictorily26
- contraindicated25
- contraindicates24
- contrapositions23
- contrapositives26
- controllability27
- controllerships26
- controversially27
- conventionalism29
- conventionalist26
- conventionality28
- conventionalize35
- convertibleness28
- conveyorization35
- cooperationists22
- cooperativeness26
- correspondingly29
- corrigibilities24
- corrosivenesses23
- corticosteroids22
- corticosterones22
- corticotrophins27
- corynebacterial28
- corynebacterium31
- cosmopolitanism29
- cotransductions25
- coulometrically30
- councillorships30
- countercampaign32
- counterchanging31
- countercharging30
- counterchecking35
- counterclaiming30
- countercyclical33
- counterevidence29
- counterguerilla25
- counterinstance25
- counterirritant21
- countermarching31
- countermelodies25
- counterordering24
- counterpetition24
- counterpicketed31
- counterplotting27
- counterpointing27
- counterpunching33
- counterquestion31
- counterrallying27
- counterreaction24
- countershadings26
- counterstaining24
- counterstepping29
- counterviolence29
- counterweighted28
- crashworthiness26
- creditabilities23
- criminalization33
- crosslinguistic26
- crossopterygian26
- crotchetinesses24
- cruciverbalists30
- cryptanalytical31
- cryptorchidisms32
- cryptozoologies35
- cryptozoologist35
- crystallinities23
- crystallization32
- cultivabilities28
- customarinesses23
- cyanocobalamine32
- cyanocobalamins32
- cyanoethylating29
- cyanoethylation27
- cyclohexylamine40
- cyproheptadines30
- cytochemistries28
- cytogenetically30
- cytogeneticists26
- cytomegalovirus31
- cytophotometric31
- cytoplasmically34
- daguerreotypies24
- daguerreotyping27
- daguerreotypist24
- damageabilities25
- dastardlinesses19
- deacidification27
- decaffeinations27
- decalcification30
- decarboxylating35
- decarboxylation33
- decarburization33
- decasualization31
- deceitfulnesses25
- deceptivenesses27
- decertification26
- dechlorinations24
- deciduousnesses23
- decimalizations33
- decolonizations31
- decolorizations30
- decommissioning29
- decompensations27
- decomposability31
- deconcentrating27
- deconcentration25
- deconsecrations24
- deconstructions25
- decontaminating27
- decontamination25
- decontaminators24
- decriminalizing36
- dedifferentiate24
- deductibilities25
- defeasibilities23
- defectivenesses27
- defeminizations33
- defenestrations21
- defensibilities24
- defensivenesses25
- defibrillations25
- deglamorization32
- dehumanizations33
- dehydrogenating27
- dehydrogenation25
- deindustrialize29
- delectabilities24
- delegitimations23
- deleteriousness19
- deliciousnesses22
- delightednesses23
- deliriousnesses19
- delocalizations31
- demagnetization32
- demandingnesses25
- dematerializing32
- demisemiquavers36
- demobilizations33
- democratization32
- demographically33
- demonetizations30
- demonstrability26
- demonstrational22
- demonstratively27
- demoralizations30
- demystification28
- demythologizers35
- demythologizing38
- denationalizing31
- denazifications33
- denitrification24
- departmentalize33
- dependabilities25
- depersonalizing33
- depigmentations26
- depolarizations30
- derivatizations30
- dermatoglyphics32
- desacralization30
- desalinizations28
- descriptiveness27
- desensitization27
- desertification23