12 letters
- carburetions20
- cardiographs23
- cardiography25
- cardiologies19
- cardiologist19
- cardiotonics20
- castigations18
- catadioptric22
- cationically23
- cautiousness18
- celebrations20
- cementations20
- cementitious20
- censoriously20
- cerebrations19
- championship29
- chemiosmotic26
- chlorination20
- chondriosome22
- chrismations21
- circulations21
- circumcision26
- circumfusion27
- citification22
- civilisation21
- civilization30
- claudication22
- coacervation23
- coadaptation20
- coagulations20
- coalitionist17
- coarctations19
- codification23
- codirections20
- coeducations21
- coevolutions22
- cogeneration19
- cohabitation21
- cohesionless19
- colligations20
- collimations21
- collocations21
- colonisation18
- colonization27
- colorization26
- columniation22
- combinations23
- commendation24
- comminations23
- comminutions24
- commissioned23
- commissioner22
- commodiously26
- commutations23
- companionate23
- companioning26
- companionway28
- compatriotic24
- compellation24
- compensation23
- competitions22
- compilations23
- complexation30
- complexional31
- complexioned31
- complication26
- compositions22
- compressions22
- compunctions27
- compunctious27
- compurgation25
- computations23
- conceptional24
- concessional21
- concessioner20
- conciliation21
- condemnation22
- condensation19
- conditionals19
- conditioners18
- conditioning21
- condonations19
- confectioner23
- confessional21
- confirmation23
- confiscation23
- conflictions24
- conformation23
- confutations21
- congelations20
- conglobation23
- congregation21
- conidiophore22
- conjugations29
- conjunctions31
- conjurations27
- connectional22
- connotations18
- conscionable24
- conscription23
- consecration20
- consecutions21
- conservation21
- consignation20
- consociation20
- consolations18
- conspiration20
- constipation20
- constitution18
- constriction20
- construction21
- consultation19
- consummation24
- consumptions24
- contagiously22
- contestation17
- continuation19
- contractions20
- contraptions20
- contribution21
- contumacious24
- contumelious22
- conurbations21
- convectional25
- conventional23
- conversation21
- conversional22
- convocations24
- convolutions23
- cooperations19
- coordination18
- coproduction24
- corporations19
- correctional20
- correlations17
- corrugations19
- coruscations20
- covariations20
- craniofacial23
- craniologies19
- craniosacral20
- craniotomies19
- creationisms19
- creationists16
- crenelations18
- crenellation19
- crenulations19
- creolization26
- crepitations19
- criminations20
- crucifixions30
- culminations22
- cultivations22
- cupellations22
- curarization26
- cuspidations21
- cybernations22
- cyclizations31
- deactivation21
- deaminations18
- debarkations21
- debilitation18
- decantations18
- decapitation20
- deceleration18
- declamations21
- declarations18
- declensional20
- declinations19
- decollations19
- decommission23
- deconditions19
- decongestion20
- decussations18
- deescalation18
- defalcations21
- definitional19
- deflagration20
- deflationary20
- deflorations18
- defoliations18
- deformations20
- degeneration17
- deglaciation20
- deglutitions18
- degradations17
- degustations17
- dehydrations19
- deifications20
- deionization24
- delamination19
- delectations18
- deliberation18
- delimitation18
- delineations16
- demarcations20
- demodulation20
- demonization27
- denaturation16
- denervations19