| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Actual | 6 | 3 | 3 | 3 |
| Ascertained | 11 | 6 | 5 | 3 |
| Attested | 8 | 5 | 3 | 3 |
| Authentic | 9 | 5 | 4 | 3 |
| Authenticated | 13 | 7 | 6 | 5 |
| Bona Fide | 9 | 5 | 4 | 3 |
| Categorically True | 18 | 11 | 7 | 7 |
| Certain | 7 | 4 | 3 | 2 |
| Certainly | 9 | 6 | 3 | 3 |
| Certified | 9 | 5 | 4 | 3 |
| Chronic | 7 | 5 | 2 | 2 |
| Compulsive | 10 | 6 | 4 | 3 |
| Confirmed | 9 | 6 | 3 | 2 |
| Corroborated | 12 | 7 | 5 | 5 |
| Demonstrated | 12 | 8 | 4 | 4 |
| Determined | 10 | 6 | 4 | 3 |
| Direct | 6 | 4 | 2 | 2 |
| Discovered | 10 | 6 | 4 | 3 |
| Docudrama | 9 | 5 | 4 | 4 |
| Driven | 6 | 4 | 2 | 2 |
| Effective | 9 | 5 | 4 | 3 |
| Effectual | 9 | 5 | 4 | 4 |
| Efficacious | 11 | 5 | 6 | 4 |
| Engineer | 8 | 4 | 4 | 3 |
| Established | 11 | 7 | 4 | 3 |
| Existent | 8 | 5 | 3 | 3 |
| Factual | 7 | 4 | 3 | 3 |
| For Certain | 11 | 7 | 4 | 3 |
| For Sure | 8 | 5 | 3 | 2 |
| Habitual | 8 | 4 | 4 | 4 |
| Historic | 8 | 5 | 3 | 3 |
| Historical | 10 | 6 | 4 | 4 |
| Infotainment | 12 | 7 | 5 | 4 |
| Inveteratea | 11 | 5 | 6 | 5 |
| Mastermind | 10 | 7 | 3 | 3 |
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