| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Equal To | 8 | 4 | 4 | 3 |
| Equal Top | 9 | 5 | 4 | 3 |
| Established | 11 | 7 | 4 | 3 |
| Estimable | 9 | 5 | 4 | 4 |
| Etiologic | 9 | 4 | 5 | 5 |
| Etiological | 11 | 5 | 6 | 6 |
| Eventful | 8 | 5 | 3 | 3 |
| Executable | 10 | 5 | 5 | 5 |
| Existent | 8 | 5 | 3 | 3 |
| Expert | 6 | 4 | 2 | 2 |
| Factual | 7 | 4 | 3 | 3 |
| Fascinating | 11 | 7 | 4 | 4 |
| Fat | 3 | 2 | 1 | 1 |
| Feasible | 8 | 4 | 4 | 3 |
| Fertile | 7 | 4 | 3 | 2 |
| Firm | 4 | 3 | 1 | 1 |
| Forceful | 8 | 5 | 3 | 3 |
| Forcible | 8 | 5 | 3 | 3 |
| Formative | 9 | 5 | 4 | 3 |
| For Certain | 11 | 7 | 4 | 3 |
| For Sure | 8 | 5 | 3 | 2 |
| Fulfilling | 10 | 7 | 3 | 3 |
| Functional | 10 | 6 | 4 | 3 |
| Go | 2 | 1 | 1 | 1 |
| Good | 4 | 2 | 2 | 1 |
| Go Game | 7 | 4 | 3 | 2 |
| Habitual | 8 | 4 | 4 | 4 |
| Herculean | 9 | 5 | 4 | 3 |
| Historic | 8 | 5 | 3 | 3 |
| Historical | 10 | 6 | 4 | 4 |
| Important | 9 | 6 | 3 | 3 |
| Influential | 11 | 6 | 5 | 3 |
| Infotainment | 12 | 7 | 5 | 4 |
| Inveteratea | 11 | 5 | 6 | 5 |
| In Force | 8 | 5 | 3 | 2 |
Efficacious Synonyms
Cognitive synonyms list for efficacious, page 3. Efficacious is a 11 letter word, used as a article, an SAT word with Old French origins, and has the letters acceffiiosu (acefiosu). Starts with e, ends with s, five consonants, six vowels and four syllables.
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