15 letters
- counterquestion31
- counterrallying27
- counterreaction24
- counterreformer26
- counterresponse24
- countershadings26
- counterstaining24
- counterstepping29
- counterstrategy24
- countertendency28
- counterviolence29
- counterweighted28
- courteousnesses21
- credulousnesses23
- crosslinguistic26
- cruciverbalists30
- cultivabilities28
- customarinesses23
- cytomegalovirus31
- daguerreotypies24
- daguerreotyping27
- daguerreotypist24
- dangerousnesses21
- dauntlessnesses20
- decarburization33
- decasualization31
- deceitfulnesses25
- deciduousnesses23
- deconstructions25
- deductibilities25
- dehumanizations33
- deindustrialize29
- deleteriousness19
- deliciousnesses22
- deliriousnesses19
- demisemiquavers36
- desexualization35
- despiritualized31
- despiritualizes30
- dessertspoonful25
- destitutenesses18
- destructibility26
- destructionists21
- destructiveness25
- destructivities24
- desulfurization32
- desultorinesses19
- deuteranomalies22
- deuteranomalous23
- dexterousnesses25
- dichotomousness26
- diffusivenesses28
- disadvantageous25
- disambiguations26
- disarticulating24
- disarticulation22
- discombobulated31
- discombobulates30
- discontinuances26
- discontinuation23
- discontinuities22
- discontinuously26
- discountenanced27
- discountenances26
- discouragements26
- disequilibrated31
- disequilibrates30
- disequilibriums34
- disfurnishments27
- disgracefulness27
- disgruntlements25
- disillusionment24
- disreputability26
- disrespectfully30
- dissolutenesses19
- distastefulness22
- distemperatures23
- distinguishable26
- distinguishably28
- distressfulness22
- distributorship25
- distrustfulness23
- documentational26
- doubtlessnesses22
- dramaturgically29
- echinodermatous26
- educationalists22
- effectualnesses27
- efficaciousness29
- effortfulnesses27
- egregiousnesses21
- electroacoustic26
- electrosurgical26
- emulsifications27
- enantiomorphous26
- endonucleolytic29
- enterobacterium26
- entrepreneurial22
- enumerabilities24
- epitheliomatous25
- equalitarianism30
- equitablenesses30
- equivocalnesses34
- erroneousnesses18
- ethnomusicology30
- eudiometrically27
- euphemistically31
- eutrophications25
- excludabilities32
- exclusivenesses32
- excommunicating39
- excommunication37
- excommunicative40
- excommunicators36
- excrementitious30
- excursivenesses31
- excusablenesses31
- exhaustlessness27
- expeditiousness28
- exquisitenesses33
- exsanguinations28
- extinguishments32
- extracellularly32
- extracurricular31
- extrajudicially40
- extralinguistic30
- extrudabilities28
- facetiousnesses23
- faultlessnesses22
- feloniousnesses22
- ferociousnesses23
- fissiparousness23
- flirtatiousness21
- floriculturists25
- floriferousness24
- forgetfulnesses26
- formularization33
- fortunatenesses21
- fortunetellings25
- fractiousnesses23
- frightfulnesses28
- frivolousnesses25
- fructifications29
- fruitlessnesses21
- functionalistic28
- functionalities25
- fundamentalisms29
- fundamentalists26
- futilitarianism24
- garrulousnesses21
- gewurztraminers34
- glamorousnesses23
- glucocorticoids29
- gluconeogeneses26
- gluconeogenesis26
- glutaraldehydes26
- grandiloquences34
- grandiloquently34
- grotesquenesses28
- guilelessnesses21
- guiltlessnesses21
- gyrofrequencies36
- hallucinogenics30
- hazardousnesses29
- healthfulnesses26
- hemagglutinated28
- hemagglutinates27
- hemoglobinurias28
- hermeneutically29
- heterogeneously24
- heterosexuality28
- hilariousnesses20
- homogeneousness25
- homosexualities29
- horticulturally27
- horticulturists23
- houselessnesses20
- housewifeliness26
- humanitarianism26
- humidifications29
- humorlessnesses23
- hydrocephaluses30
- hydrometallurgy30
- hypercoagulable33
- hyperfastidious27
- hyperfunctional32
- hyperimmunizing42
- hyperinsulinism29
- hyperinvolution30
- hypermutability32
- hyperproduction31
- hyperstimulated28
- hyperstimulates27
- hypopituitarism29
- ichthyosaurians26
- ignominiousness24
- illustriousness20
- immunoassayable29
- immunoblottings30
- immunochemistry33