13 letters
- combinational25
- commemorating28
- commemoration26
- commemorative29
- commendations25
- commiserating25
- commiseration23
- commiserative26
- commonalities24
- communalities25
- communicating30
- communication28
- communicative31
- communization34
- commutativity29
- comparatively29
- comparativist26
- compatibility28
- compellations25
- compensations24
- competitively29
- complementing30
- complexations31
- complications27
- complimenting30
- compositional24
- compurgations26
- computational25
- concatenating24
- concatenation22
- concentrating24
- concentration22
- concentrative25
- conciliations22
- concretionary23
- condemnations23
- condensations20
- conditionable23
- conditionally23
- confabulating28
- confabulation26
- confectionary26
- confectioners24
- confectionery26
- confederating24
- confederation22
- confederative25
- configuration24
- configurative27
- confirmations24
- confiscations24
- conflagration24
- conflictingly30
- conformations24
- confrontation22
- conglobations24
- conglomeratic26
- conglutinated23
- conglutinates22
- congregations22
- conjugalities30
- conjugational31
- conjunctional33
- conjunctively38
- connotational20
- connotatively25
- conscientious22
- conscriptions24
- consecrations21
- consecutively28
- consequential29
- conservations22
- conservatisms24
- conservatives25
- conservatized31
- conservatizes30
- consideration19
- consignations21
- consociations21
- consolidating22
- consolidation20
- conspicuities24
- conspirations21
- constellating22
- constellation20
- consternating21
- consternation19
- constipations21
- constituently22
- constitutions19
- constrictions21
- constructible25
- constructions22
- consultations20
- consumeristic24
- consummations25
- consumptively31
- contaminating24
- contamination22
- contaminative25
- contemplating27
- contemplation25
- contemplative28
- contentiously22
- contestations18
- continentally23
- contingencies24
- continuations20
- contortionist18
- contraception24
- contraceptive27
- contractility23
- contractional22
- contradicting24
- contradiction22
- contrapuntist22
- contrarieties17
- contrastively24
- contravention23
- contributions22
- controverting24
- conventiclers26
- conventioneer23
- conversations22
- convertiplane26
- convocational26
- cooperatively26
- coordinations19
- coplanarities21
- coproductions25
- coresidential19
- cornification24
- corporalities20
- corporativism26
- correctitudes21
- correlational19
- correlatively24
- corroborating22
- corroboration20
- corroborative23
- corruptionist21
- corticotropin23
- cosmeticizing34
- cosmopolitism26
- costivenesses21
- counteracting24
- counteraction22
- counteractive25
- countinghouse24
- credentialing22
- credentialism22
- credentialled21
- credibilities21
- crenellations20
- creolizations27
- criminalities21
- criticalities20
- crosscuttings23
- crotchetiness22
- cryptanalytic28
- culpabilities25
- cultishnesses21
- cultivability28
- curarizations27
- customization30
- cybernetician26
- cyberneticist25
- cyclicalities26
- cycloaddition25
- cysticercoids25
- cysticercoses24
- cysticercosis24
- cytogenetical25
- dandification23
- deactivations22
- debilitations19
- decapitations21
- decarbonating24
- decarbonation22
- decelerations19
- deceptiveness25
- decerebrating23
- decerebration21
- declaratively25
- declinational21
- decomposition24
- deconditioned21
- decongestions21
- decorticating23
- decortication21
- decorticators20
- decrepitating23
- decrepitation21
- deductibility25
- deescalations19
- defectiveness25
- deferentially22
- defibrinating24
- defibrination22
- deflagrations21