20 Letter Words (YAWL)
| ACETYLCHOLINESTERASE | ADRENOCORTICOSTEROID |
| ADRENOCORTICOTROPHIC | ADRENOCORTICOTROPHIN |
| ADRENOCORTICOTROPINS | ADRENOLEUKODYSTROPHY |
| ANTHROPOCENTRICITIES | ANTHROPOMORPHIZATION |
| ANTIAUTHORITARIANISM | ANTICONSERVATIONISTS |
| ANTIFLUORIDATIONISTS | ANTIPHILOPROGENITIVE |
| AUTOSUGGESTIBILITIES | AUTOTRANSPLANTATIONS |
| BACTERIOCHLOROPHYLLS | BALLISTOCARDIOGRAPHS |
| BALLISTOCARDIOGRAPHY | BUCKMINSTERFULLERENE |
| CHEMOAUTOTROPHICALLY | CHEMOTHERAPEUTICALLY |
| CHLOROFLUOROMETHANES | COMPARTMENTALISATION |
| COMPARTMENTALIZATION | COMPREHENSIBLENESSES |
| COMPREHENSIVISATIONS | COMPREHENSIVIZATIONS |
| CONSUBSTANTIATIONIST | CONTRADISTINGUISHING |
| CONVENTIONALIZATIONS | COUNTERCONDITIONINGS |
| COUNTERDEMONSTRATING | COUNTERDEMONSTRATION |
| COUNTERDEMONSTRATORS | COUNTERINTELLIGENCES |
| COUNTERMOBILIZATIONS | COUNTERREVOLUTIONARY |
| COUNTERREVOLUTIONIST | COUNTERSURVEILLANCES |
| COUNTERTRANSFERENCES | CRYSTALLOGRAPHICALLY |
| CYTODIFFERENTIATIONS | DEHYDROCHLORINATIONS |
| DEINDUSTRIALISATIONS | DEINDUSTRIALIZATIONS |
| DEINSTITUTIONALIZING | DEOXYCORTICOSTERONES |
| DEOXYRIBONUCLEOTIDES | DEPARTMENTALISATIONS |
| DEPARTMENTALIZATIONS | DIMETHYLNITROSAMINES |
| DISCOMMENDABLENESSES | DISINDUSTRIALISATION |
| DISINDUSTRIALIZATION | DISPROPORTIONATENESS |
| DISTINGUISHABILITIES | ECHOENCEPHALOGRAPHIC |
| ELECTROCARDIOGRAPHIC | ELECTROENCEPHALOGRAM |
| ELECTROHYDRAULICALLY | ELECTROLUMINESCENCES |
| ELECTROMETALLURGICAL | ELECTROMETALLURGISTS |
| ELECTROOCULOGRAPHIES | ELECTROPHOTOGRAPHIES |
| ELECTROPHYSIOLOGICAL | ELECTROPHYSIOLOGISTS |
| ELECTRORETINOGRAPHIC | ENCEPHALOGRAPHICALLY |
| ENCEPHALOMYOCARDITIS | EXISTENTIALISTICALLY |
| EXPRESSIONLESSNESSES | EXTEMPORANEOUSNESSES |
| FORETHOUGHTFULNESSES | GLOMERULONEPHRITIDES |
| HISTOCOMPATIBILITIES | HOMOTRANSPLANTATIONS |
| HYDROCHLOROTHIAZIDES | HYPERCHOLESTEROLEMIA |
| HYPERCHOLESTEROLEMIC | HYPERCOAGULABILITIES |
| HYPERCONSCIOUSNESSES | HYPERPARATHYROIDISMS |
| HYPERSENSITIVENESSES | IMMUNOCYTOCHEMICALLY |
| IMMUNOHISTOCHEMISTRY | IMMUNOPATHOLOGICALLY |
| IMMUNOPRECIPITATIONS | IMPRESCRIPTIBILITIES |
| IMPRESSIONABLENESSES | INAPPRECIATIVENESSES |
| INAPPREHENSIVENESSES | INCOMMENSURABILITIES |
| INCOMMENSURATENESSES | INCOMMUNICABLENESSES |
| INCOMPREHENSIBLENESS | INCOMPRESSIBLENESSES |
| INCONSEQUENTIALITIES | INCONSIDERABLENESSES |
| INCONTROVERTIBLENESS | INDECIPHERABLENESSES |
| INDEMONSTRABLENESSES | INDESTRUCTIBLENESSES |
| INDETERMINABLENESSES | INDISCRIMINATENESSES |
| INDISTINGUISHABILITY | INEXTINGUISHABLENESS |
| INSTITUTIONALISATION | INSTITUTIONALIZATION |
| INSURMOUNTABLENESSES | INTELLECTUALIZATIONS |
| INTERCHANGEABILITIES | INTERCONNECTEDNESSES |
| INTERNATIONALISATION | INTERNATIONALIZATION |
| INTERSTRATIFICATIONS | IRRECONCILABLENESSES |
| IRREPROACHABLENESSES | KERATOCONJUNCTIVITIS |
| LYMPHOGRANULOMATOSES | LYMPHOGRANULOMATOSIS |
| MAGNETOELECTRICITIES | MAGNETOFLUIDDYNAMICS |
| MAGNETOHYDRODYNAMICS | METROPOLITANIZATIONS |
| MICROCRYSTALLINITIES | MICROELECTROPHORESES |
| MICROELECTROPHORESIS | MICROELECTROPHORETIC |
| MICROMINIATURISATION | MICROMINIATURIZATION |
| MICROPALAEONTOLOGIES | MICROPALAEONTOLOGIST |
| MICROPALEONTOLOGICAL | MICROPALEONTOLOGISTS |
| MICROPHOTOMETRICALLY | MISCHARACTERIZATIONS |
| NEUROENDOCRINOLOGIES | NEUROENDOCRINOLOGIST |
| NEUROPHARMACOLOGICAL | NEUROPHARMACOLOGISTS |
| NEUROPHYSIOLOGICALLY | NEUROPSYCHIATRICALLY |
| NONDENOMINATIONALISM | NONDESTRUCTIVENESSES |
| NONINSTITUTIONALIZED | OVERAGGRESSIVENESSES |
| OVERDIFFERENTIATIONS | OVERENTHUSIASTICALLY |
| OVERINTELLECTUALIZED | OVERINTELLECTUALIZES |
| OVERPROTECTIVENESSES | OVERSCRUPULOUSNESSES |
| PALAEANTHROPOLOGICAL | PALAEANTHROPOLOGISTS |
| PALAEOANTHROPOLOGIES | PALAEOANTHROPOLOGIST |
| PALAEOCLIMATOLOGICAL | PALAEOCLIMATOLOGISTS |
| PALAEOICHTHYOLOGICAL | PALAEOICHTHYOLOGISTS |
| PALEOANTHROPOLOGICAL | PALEOANTHROPOLOGISTS |
| PALEOBIOGEOGRAPHICAL | PARADICHLOROBENZENES |
| PARALLELOGRAMMATICAL | PARATHYROIDECTOMIZED |
| PHACOEMULSIFICATIONS | PHANTASMOGENETICALLY |
| PHENYLPROPANOLAMINES | PHENYLTHIOCARBAMIDES |
| PHILOPROGENITIVENESS | PHOSPHATIDYLCHOLINES |
| PHOSPHOENOLPYRUVATES | PHOSPHOFRUCTOKINASES |
| PHOSPHOMONOESTERASES | PHOTOAUTOTROPHICALLY |
| PHOTODISINTEGRATIONS | PHOTOINTERPRETATIONS |
| PHOTOPHOSPHORYLATION | PHOTORECONNAISSANCES |
| PHOTOTYPOGRAPHICALLY | PLETHYSMOGRAPHICALLY |
| POLYHYDROXYBUTYRATES | POLYPHILOPROGENITIVE |
| PROFESSIONALISATIONS | PROFESSIONALIZATIONS |
| PROPORTIONABLENESSES | PSEUDOCHOLINESTERASE |
| PSEUDOFOLLICULITISES | PSEUDOHERMAPHRODITES |
| PSEUDOHERMAPHRODITIC | PSEUDOPARENCHYMATOUS |
| PSEUDOSOPHISTICATION | PSYCHOPATHOLOGICALLY |
| PSYCHOPHARMACOLOGIES | PSYCHOPHARMACOLOGIST |
| RADIOIMMUNOASSAYABLE | RADIOPHARMACEUTICALS |
| RECONCEPTUALIZATIONS | REINDUSTRIALISATIONS |
| REINDUSTRIALIZATIONS | REINSTITUTIONALIZING |
| REPRESENTATIONALISMS | REPRESENTATIONALISTS |
| REPRESENTATIVENESSES | ROENTGENOGRAPHICALLY |
| SEMIAUTOBIOGRAPHICAL | SPECTROFLUOROMETRIES |
| SPECTROHELIOGRAPHIES | SPECTROPHOTOMETRICAL |
| SUPERSENSITIVENESSES | SUPERSPECIALIZATIONS |
| SUPPOSITITIOUSNESSES | SYNCATEGOREMATICALLY |
| TETRACHLOROETHYLENES | TETRAHYDROCANNABINOL |
| TRANSCENDENTALNESSES | TRANSFORMATIONALISTS |
| ULTRACENTRIFUGATIONS | ULTRAMICROSCOPICALLY |
| ULTRAMINIATURIZATION | ULTRAREVOLUTIONARIES |
| ULTRASEGREGATIONISTS | UNAPPREHENSIVENESSES |
| UNAPPROACHABLENESSES | UNCHARACTERISTICALLY |
| UNCOMPROMISINGNESSES | UNCONSCIONABLENESSES |
| UNCONTROLLABLENESSES | UNDENOMINATIONALISMS |
| UNDERCAPITALISATIONS | UNDERCAPITALIZATIONS |
| UNDERCONSCIOUSNESSES | UNDERREPRESENTATIONS |
| UNINTELLIGIBLENESSES | UNMARRIAGEABLENESSES |
| UNOSTENTATIOUSNESSES | UNPREMEDITATEDNESSES |
| UNQUESTIONABLENESSES | UNRECONCILABLENESSES |
| UNREPRESENTATIVENESS | UNSATISFACTORINESSES |
| UNTRANSLATABLENESSES | XENOTRANSPLANTATIONS |