21 Letter Words (ENABLE)
| ACETYLCHOLINESTERASES | ADRENOCORTICOSTEROIDS |
| ADRENOCORTICOTROPHINS | ANTHROPOMORPHIZATIONS |
| ANTIAUTHORITARIANISMS | ANTIFERROMAGNETICALLY |
| BUCKMINSTERFULLERENES | CLINICOPATHOLOGICALLY |
| COMPARTMENTALIZATIONS | CONSTITUTIONALIZATION |
| CONTEMPORANEOUSNESSES | COUNTERCOUNTERMEASURE |
| COUNTERDEMONSTRATIONS | COUNTERINTERPRETATION |
| DENDROCHRONOLOGICALLY | DISADVANTAGEOUSNESSES |
| DISESTABLISHMENTARIAN | ELECTROCARDIOGRAPHIES |
| ELECTROENCEPHALOGRAMS | ELECTROENCEPHALOGRAPH |
| ELECTROMYOGRAPHICALLY | ELECTRORETINOGRAPHIES |
| ESTABLISHMENTARIANISM | EXTRATERRITORIALITIES |
| HYPERCHOLESTEROLEMIAS | HYPERSUSCEPTIBILITIES |
| IMMUNOCYTOCHEMISTRIES | IMMUNOELECTROPHORESES |
| IMMUNOELECTROPHORESIS | IMMUNOELECTROPHORETIC |
| INCOMPREHENSIBILITIES | INDISTINGUISHABLENESS |
| INSTITUTIONALIZATIONS | INTERCHANGEABLENESSES |
| INTERCONVERTIBILITIES | INTERNATIONALIZATIONS |
| INTERSUBSTITUTABILITY | MENINGOENCEPHALITIDES |
| MICROMINIATURIZATIONS | MULTIDIMENSIONALITIES |
| NEUROENDOCRINOLOGICAL | NEUROENDOCRINOLOGISTS |
| NONDENOMINATIONALISMS | OTORHINOLARYNGOLOGIES |
| OTORHINOLARYNGOLOGIST | OVERCOMMERCIALIZATION |
| OVERINTELLECTUALIZING | PHOSPHOGLYCERALDEHYDE |
| PHOTOLITHOGRAPHICALLY | PHOTOPHOSPHORYLATIONS |
| PSEUDOCHOLINESTERASES | PSEUDOSOPHISTICATIONS |
| PSYCHOPHARMACOLOGICAL | PSYCHOPHARMACOLOGISTS |
| PSYCHOPHYSIOLOGICALLY | PSYCHOTHERAPEUTICALLY |
| STEREOMICROSCOPICALLY | STRAIGHTFORWARDNESSES |
| TETRAHYDROCANNABINOLS | UNCONSTITUTIONALITIES |
| UNDEMONSTRATIVENESSES | UNEXCEPTIONABLENESSES |