This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
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adj. comparative form of sure: more sure

"Nevertheless, the more the people of the country discussed the matter, the surer was their conviction that Washington was right when he intimated that they must prefer the new Constitution unless they could show reason for supposing that the anarchy towards which the old order was swiftly driving them was preferable."

fuhrer    insurer    juror    moorer    procurer   

firmest    infallible    secure    effectual    indubitable