Fifteen letter words
| Acknowledgement |
| Appropriateness |
| Authoritatively |
| Comfortableness |
| Confrontational |
| Connoisseurship |
| Conscientiously |
| Consecutiveness |
| Conspicuousness |
| Counterproposal |
| Destructiveness |
| Dispassionately |
| Disproportional |
| Dissatisfaction |
| Distinctiveness |
| Gentlemanliness |
| Hospitalisation |
| Humanitarianism |
| Impecuniosities |
| Inattentiveness |
| Inconsequential |
| Indefensibility |
| Ineffectiveness |
| Inquisitiveness |
| Instantaneously |
| Instrumentalist |
| Instrumentality |
| Instrumentation |
| Insubordination |
| Insurrectionist |
| Intensification |
| Interchangeable |
| Interco version |
| Interconnection |
| Internationally |
| Interventionist |
| Introduction(To |
| Jurisprudential |
| Misapprehension |
| Mischievousness |
| Misconstruction |
| Multitudinously |
| Nationalisation |
| North easterner |
| Notwithstanding |
| Personification |
| Procrastination |
| Professionalism |
| Resourcefulness |
| Sanctimoniously |
| Straightforward |
| Sub continental |
| Sympathetically |
| Temperamentally |
| Transplantation |
| Trouble-shooter |
| Trustworthiness |
| Unaccommodating |
| Unauthenticated |
| Unceremoniously |
| Uncommunicative |
| Uncomplimentary |
| Uncomprehending |
| Unconditionally |
| Unconsciousness |
| Undemonstrative |
| Underestimation |
| Underprivileged |
| Underproduction |
| Understandingly |
| Unintelligently |
| Unintentionally |
| Uninterruptedly |
| Unobjectionable |
| Unobtrusiveness |
| Unquestioningly |
| Unsubstantiated |