15 letters
- bronchoscopists30
- brotherlinesses22
- bumptiousnesses27
- businesspersons24
- cannibalization34
- capaciousnesses26
- capitalizations32
- carcinogenicity30
- carcinosarcomas28
- cardiopulmonary30
- carnivorousness25
- categorizations30
- catheterization30
- centralizations30
- centrifugations26
- centrosymmetric30
- cephalothoraces29
- cephalothoraxes33
- cerebrovascular30
- ceremoniousness24
- chancellorships31
- channelizations33
- chemoautotrophy31
- chemoreceptions30
- chemotactically33
- chemotaxonomies34
- chemotaxonomist34
- chemotherapists28
- chloramphenicol34
- chlorothiazides33
- chlorpromazines37
- chlorpropamides31
- cholangiography33
- cholecalciferol32
- cholecystectomy34
- cholecystitides27
- cholecystokinin32
- cholestyramines27
- cholinergically31
- cholinesterases22
- chondrocraniums30
- chordamesoderms28
- chorioallantoic26
- chorioallantois23
- choriocarcinoma30
- chromatographed31
- chromatographer30
- chromatographic33
- chronobiologies27
- chronobiologist27
- chronologically31
- chronotherapies26
- cinematographer29
- cinematographic32
- circularization33
- circumlocutions31
- circumnavigator32
- circumscription32
- circumspections32
- circumvallation32
- circumvolutions32
- civilianization34
- clamorousnesses24
- classifications26
- claustrophobias28
- cleistogamously28
- cloudlessnesses23
- coagulabilities26
- codetermination24
- codifiabilities26
- coeducationally28
- coenzymatically40
- coinvestigators25
- coldheartedness24
- collaboratively30
- collateralities21
- collateralizing33
- collectednesses25
- collenchymatous32
- colloquialities31
- colonizationist30
- colorfastnesses23
- colorlessnesses21
- combativenesses29
- combinatorially29
- comfortableness29
- commemoratively34
- commensurations27
- commercialising31
- commercialistic31
- commercialities28
- commercializing40
- commiseratingly30
- commissionaires25
- commodification32
- commonplaceness33
- communicability35
- communicational31
- communicatively36
- communistically33
- commutativities29
- comparabilities28
- comparativeness29
- compassionately28
- compassionating28
- compatibilities28
- compendiousness28
- competitiveness29
- complementaries29
- complementarily32
- complementarity31
- complementation30
- complementizers38
- complicatedness30
- complimentarily32
- compositionally29
- comprehensively34
- compressibility30
- comptrollership31
- computabilities29
- computationally30
- computerization35
- computerphobias33
- comradelinesses24
- conceitednesses24
- conceivableness31
- concelebrations27
- concentricities26
- conceptualising30
- conceptualistic30
- conceptualities27
- conceptualizers36
- conceptualizing39
- concertednesses24
- concertmeisters25
- concessionaires23
- concretizations32
- condescendences29
- condescendingly31
- conducivenesses29
- confectionaries26
- confectioneries26
- confessionalism27
- confessionalist24
- confidentiality27
- confidingnesses27
- configurational27
- confirmednesses27
- confraternities23
- confrontational25
- conglomerateurs26
- conglomerations26
- conglutinations25
- congratulations24
- congressionally26
- congresspersons25
- congruousnesses24
- conjugatenesses32
- conjugationally36
- conjunctionally38
- connaturalities22
- connectednesses25
- connoisseurship26
- consanguinities24
- conscientiously27
- consciousnesses24
- consecutiveness28
- consentaneously25
- consequentially34
- conservationist24
- conservatorship28
- considerateness21
- conspicuousness28
- constitutionals22
- constructionist24
- constructivisms30
- constructivists27
- consultantships27
- containerboards24
- contemplatively33
- contemporaneity28
- contemporaneous27
- contemptibility31
- contentednesses22
- contentiousness22
- contextualizing40
- contortionistic23
- contractibility28
- contractilities23
- contradictories23
- contradictorily26
- contraindicated25
- contraindicates24
- contrapositions23
- contrapositives26
- controllability27
- controllerships26
- controversially27
- conventionalism29
- conventionalist26