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There are 12 fifteen-letter words containing EFF
| EFFECTIVENESSES | • effectivenesses n. Plural of effectiveness. • EFFECTIVENESS n. the state of being effective. |
| EFFECTUALNESSES | • EFFECTUALNESS n. the state of being effectual. |
| EFFERVESCENCIES | • effervescencies n. Plural of effervescency. • EFFERVESCENCY n. boiling or bubbling, also EFFERVESCENCE. |
| EFFICACIOUSNESS | • efficaciousness n. Quality of being efficacious. • EFFICACIOUS n. having the power to produce a desired effect. |
| EFFORTFULNESSES | • EFFORTFULNESS n. EFFORTFUL, requiring effort. |
| HYPEREFFICIENCY | Sorry, definition not available. |
| INEFFABLENESSES | • INEFFABLENESS n. the state of being ineffable. |
| INEFFACEABILITY | • ineffaceability n. Quality of being ineffaceable. • INEFFACEABILITY n. the state of being ineffaceable. |
| INEFFECTIVENESS | • ineffectiveness n. The condition of being ineffective. • INEFFECTIVENESS n. the state of being ineffective. |
| INEFFECTUALNESS | • ineffectualness n. Inefficacy. • INEFFECTUALNESS n. the state of being ineffectual. |
| INEFFICACIOUSLY | • inefficaciously adv. Without efficacy or effect. • INEFFICACIOUS adv. lacking the power to produce a desired effect. |
| SUPEREFFICIENCY | • superefficiency n. The quality of being superefficient. • SUPEREFFICIENCY n. the state of being superefficient. |
Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.
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See this list for:
- English Wiktionary: 112 words
- Scrabble in French: 16 words
- Scrabble in Spanish: no word
- Scrabble in Italian: 22 words
- Scrabble in German: no word
- Scrabble in Romanian: no word
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- Ortograf.ws to look for words.
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