Page 1: professional, national, unconditional, International, emotional, inspirational, irrational, conditional, delusional, additional, prepositional, dimensional, proportional, dysfunctional, fictional, optional, accessional, rational, regional, dissolutional, unconventional, congressional, exceptional, functional, appositional, ideational, motivational, situational, computational, acculturational, educational, conventional, adaptational, informational, notional, gravitational, traditional, equiproportional, apparitional, coeducational, afforestational, avocational, unemotional, intentional, transitional, gradational, inflectional, secretional, occasional, and fractional
| Word | Length | Vowels | Syllables | |||
|---|---|---|---|---|---|---|
| Professional | 12 | 7 | 5 | 4 | English | |
| National | 8 | 4 | 4 | 3 | New Latin | |
| Unconditional | 13 | 7 | 6 | 5 | ||
| International | 13 | 7 | 6 | 5 | ||
| Emotional | 9 | 4 | 5 | 4 | ||
| Inspirational | 13 | 7 | 6 | 5 | ||
| Irrational | 10 | 5 | 5 | 4 | Latin | |
| Conditional | 11 | 6 | 5 | 4 | Old French | |
| Delusional | 10 | 5 | 5 | 4 | ||
| Additional | 10 | 5 | 5 | 4 | ||
| Prepositional | 13 | 7 | 6 | 5 | Latin | |
| Dimensional | 11 | 6 | 5 | 4 | ||
| Proportional | 12 | 7 | 5 | 4 | ||
| Dysfunctional | 13 | 9 | 4 | 4 | ||
| Fictional | 9 | 5 | 4 | 3 | ||
| Optional | 8 | 4 | 4 | 3 | English | |
| Accessional | 11 | 6 | 5 | 4 | ||
| Rational | 8 | 4 | 4 | 3 | Old French | |
| Regional | 8 | 4 | 4 | 3 | Latin | |
| Dissolutional | 13 | 7 | 6 | 5 | ||
| Unconventional | 14 | 8 | 6 | 5 | ||
| Congressional | 13 | 8 | 5 | 4 | ||
| Exceptional | 11 | 6 | 5 | 4 | ||
| Functional | 10 | 6 | 4 | 3 | ||
| Appositional | 12 | 6 | 6 | 5 | ||
| Ideational | 10 | 4 | 6 | 4 | ||
| Motivational | 12 | 6 | 6 | 5 | ||
| Situational | 11 | 5 | 6 | 5 | ||
| Computational | 13 | 7 | 6 | 5 | ||
| Acculturational | 15 | 8 | 7 | 6 | ||
| Educational | 11 | 5 | 6 | 5 | ||
| Conventional | 12 | 7 | 5 | 4 | ||
| Adaptational | 12 | 6 | 6 | 5 | ||
| Informational | 13 | 7 | 6 | 5 | ||
| Notional | 8 | 4 | 4 | 3 | ||
| Gravitational | 13 | 7 | 6 | 5 | ||
| Traditional | 11 | 6 | 5 | 4 | ||
| Equiproportional | 16 | 8 | 8 | 6 | ||
| Apparitional | 12 | 6 | 6 | 5 | ||
| Coeducational | 13 | 6 | 7 | 5 | ||
| Afforestational | 15 | 8 | 7 | 6 | ||
| Avocational | 11 | 5 | 6 | 5 | ||
| Unemotional | 11 | 5 | 6 | 5 | ||
| Intentional | 11 | 6 | 5 | 4 | ||
| Transitional | 12 | 7 | 5 | 4 | Latin | |
| Gradational | 11 | 6 | 5 | 4 | ||
| Inflectional | 12 | 7 | 5 | 4 | ||
| Secretional | 11 | 6 | 5 | 4 | ||
| Occasional | 10 | 5 | 5 | 4 | ||
| Fractional | 10 | 6 | 4 | 3 |
Suffix: -ional. List of words that end in ional.

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