12 letters
- circumfusing29
- clangorously23
- clapboarding26
- classicizing31
- clatteringly22
- cliffhangers27
- cocaptaining25
- cockfighting32
- cockneyfying33
- cocounseling24
- codeveloping27
- cohostessing20
- comfortingly27
- commandingly29
- commentating25
- commodifying30
- companioning26
- compellingly29
- compensating25
- complicating28
- compromising27
- concealingly26
- concentering23
- concertgoing24
- concertizing31
- conciliating23
- concretizing31
- conditioning21
- conferencing26
- confiscating25
- congealments23
- congelations20
- congeniality22
- congenitally23
- conglobating25
- conglobation23
- conglomerate22
- conglutinate21
- congratulate20
- congregating23
- congregation21
- congregators20
- congruencies23
- conjecturing32
- conscripting25
- consecrating22
- consentingly23
- consociating22
- constipating22
- constituting20
- constraining20
- constricting22
- constringent20
- constringing22
- constructing23
- consummating26
- contingences23
- contingently23
- continuingly24
- contravening24
- contributing23
- convalescing27
- conveyancing29
- convincingly30
- coordinating20
- copartnering22
- copingstones22
- copresenting22
- coprocessing24
- copublishing28
- copyrighting27
- corkscrewing28
- cornhuskings26
- cosponsoring22
- costermonger21
- counsellings22
- countersuing21
- crescendoing23
- crossbanding23
- crossbarring21
- crosscutting22
- crossruffing25
- crystalizing30
- currycombing30
- curveballing28
- cyclostyling27
- daringnesses17
- daylightings23
- deacidifying25
- deactivating23
- debilitating20
- decalcifying28
- decapitating22
- decelerating20
- decertifying24
- decimalizing32
- decolonizing30
- decolorizing29
- decongestant20
- decongesting22
- decongestion20
- decongestive23
- decreasingly22
- decrementing23
- deescalating20
- defeminizing32
- definitizing29
- deflagrating22
- degenerating19
- degringolade20
- dehumanizing32
- delaminating21
- deliberating20
- deliquescing30
- delocalizing30
- demobilizing32
- demodulating22
- demonetizing29
- demoralizing29
- demystifying26
- denitrifying22
- denominating21
- depolarizing29
- depopulating24
- depreciating22
- depressingly22
- deprograming24
- deracinating20
- derangements20
- deregulating20
- derepressing19
- derivatizing29
- desalinating18
- desalinizing27
- descrambling26
- desiderating17
- desolatingly20
- despairingly22
- desquamating29
- detasselling18
- detoxicating26
- devitalizing30
- devitrifying25
- devocalizing33
- differencing26
- digitalizing28
- dilapidating21
- dimensioning21
- diphthongize32
- disaccording23
- disaffecting25
- disaffirming25
- disannulling21
- disappearing22
- disapproving26
- disarranging19
- disbelieving24
- disbowelling24
- disburdening22
- discerningly23
- disciplining24
- discomfiting25
- discommoding26
- discomposing25
- discouraging22
- discrediting20
- disembarking26
- disembodying25
- disemboguing25
- disentailing18
- disentangled19
- disentangles18
- disentitling18
- disesteeming19
- disgruntling21
- disgustingly22
- dishevelling24
- disinclining22
- disinfecting23
- disinfesting20
- disingenuous19
- disinterring17
- disinvesting21
- dismembering25
- disorienting17
- disregarding19
- disrelishing19
- dissertating16
- dissociating19
- distempering22
- distributing20
- disturbingly23
- divaricating23
- diversifying25
- dolomitizing29
- doppelganger25
- downshifting25
- dressmakings23
- drumbeatings23
- dumbfounding29