cerebration, certitude, cessation, charlatan, chimerical, chronology, circuitous, circumlocution, citation, clandestine, clarify, clemency, coadjutor, coagulate, coalesce, coercion, cogency, cognizant, cohesion, coincidence, collusion, colossal, comatose, combustible, commendatory, commensurate, commiserate, communal, compatibility, compendium, complaisant, comport, composite, compulsive, compulsory, computation, concatenate, concentric, concessive, concomitant, condign, condiment, condolence, confiscatory, confute, congeal, congenital, conglomerate, congruity, connivance, connoisseur, connubial, consensus, consistence, consort, constriction, construe, contentious, context, contiguity, contiguous, contingent, contortion, contravene, contumacious, contumacy, contumelious, convergent, conversant, convivial, correlate, corrigible, corroborate, corrosive, cosmic, covenant, crass, credence, crescent, criterion, critique, crucial, crucible, cryptic, crystalline, culmination, culpable, cumulative, cupidity, cursive, cursory, cutaneous, cynosure.

His course was not prescribed for him by superiors; his powers were ____. 
The suppression of these anarchistic tendencies has required ____
measures.  She was just entering society, and was proving herself a popular
____.  Yes, this tree loses its leaves every year; it is a ____ tree.  He
pretends that his ____ are sound, because he can read the stars.

Debilitate, debonair, debutante, decadence, decapitate, deciduous, declivity, decompose, decorous, dedicatory, deduction, deferential, deficiency, deglutition, dehiscence, delectable, delete, deleterious, delineate, deliquescent, demarcation, demimonde, demoniac, denizen, denouement, deprecate, depreciate, derelict, derogatory, despicable, desuetude, desultory, deteriorate, diacritical, diagnosis, diaphanous, diatribe, didactic, diffusive, dilatory, dilettante, dipsomania, dirigible, discommode, discretionary, discursive, disintegrate, disparity, dispensable, disseminate, dissimulation, dissonant, distain, divagation, divination, divulge, dolor, dorsal, drastic, dubiety, duress, dynamic.

These facts do not circulate except among a limited group of people; they
are therefore ____.  The departure of the children of Israel from Egypt was
a general ____.  His philosophy, instead of conforming to a single system,
was ____.  Lamb wrote admirable letters; he has a delightful ____ style. 
The period at which our days and nights are of equal length is the ____
period.

Ebullient, ecclesiastical, echelon, eclectic, ecstatic, edict, eerie, effervescent, efficacious, effrontery, effulgence, effusion, egregious, eleemosynary, elicit, elite, elucidate, embellish, embryonic, emendation, emissary, emission, emollient, empiric, empyreal, emulous, encomium, endue, enervate, enfilade, enigmatic, ennui, enunciate, environ, epicure, epigram, episode, epistolary, epitome, equestrian, equilibrium, equinoctial, equity, equivocate, eradicate, erosion, erotic, erudition, eruptive, eschew, esoteric, espousal, estrange, ethereal, eulogistic, euphonious, evanescent, evangelical, evict, exacerbate, excerpt, excommunicate, excoriate, excruciate, execrable, exegesis, exemplary, exhalation, exhilarate, exigency, exodus, exonerate, exorbitant, exotic, expectorate, expeditious, explicable, explicit, expunge, extant, extemporaneous, extrinsic.