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List of 15-letter words containing

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There are 11 fifteen-letter words containing E, 2F, 2I, S and U

DIFFUSIBILITIESdiffusibilities n. Plural of diffusibility.
DIFFUSIBILITY n. the state of being diffusible.
DIFFUSIVENESSESdiffusivenesses n. Plural of diffusiveness.
DIFFUSIVENESS n. the state of being diffusive.
EFFICACIOUSNESSefficaciousness n. Quality of being efficacious.
EFFICACIOUS n. having the power to produce a desired effect.
INEFFICACIOUSLYinefficaciously adv. Without efficacy or effect.
INEFFICACIOUS adv. lacking the power to produce a desired effect.
INOFFICIOUSNESSinofficiousness n. The quality of being inofficious.
INOFFICIOUS n. not officious.
INSUFFICIENCIESinsufficiencies n. Plural of insufficiency.
INSUFFICIENCY n. the state of being insufficient, also INSUFFICIENCE.
INTERDIFFUSIONSinterdiffusions n. Plural of interdiffusion.
INTERDIFFUSION n. the process of diffusing and mixing freely so as to approach a homogeneous mixture.
OFFICIOUSNESSESofficiousnesses n. Plural of officiousness.
OFFICIOUSNESS n. OFFICIOUS, volunteering one's services too eagerly.
SUFFICINGNESSESSUFFICINGNESS n. the state of being sufficing.
SUPEREFFICIENCYsuperefficiency n. The quality of being superefficient.
SUPEREFFICIENCY n. the state of being superefficient.
UNFOSSILIFEROUSunfossiliferous adj. Not fossiliferous, nonfossiliferous.
UNFOSSILIFEROUS adj. not fossiliferous.

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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