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15-Letter Words That Start With: EFF

There are 5 15-letter words, 0 15-letter phrases and 0 15-letter abbr's that start with EFF.

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Expand?WordSave?LengthUsagePointsType
effectivenesses15
26 nounn
noun

• power to be effective; the quality of being able to bring about an effect

• capacity to produce strong physiological or chemical effects

efficaciousness15
25 nounn
noun

• capacity or power to produce a desired effect

effortfulnesses15
24 nounn
noun

• the quality of requiring deliberate effort

effectualnesses15
23
noun

• power to be effective; the quality of being able to bring about an effect

Tip: Scrabble EU allows far more words than US! Also change the max length to see more words.

All 15 Letter Words

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