Comparative form of smooth: more smooth(adjective)
One who, or that which, smooths.(noun)
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Use "smoother" in a sentence
"They are smoother from the factory (even the express), get smoother with time, and I prefer the button safety."
"'My dear Calvotti,' said my old patron, in Italian smoother and more choicely worded than his English, one language is pretty much the same to me as another, so long as it _is_ a language, and is spoken in Europe."
"For all the hyperventilating about Obama's "socialist" sic designs, his problem is that is just Clinton redux, that is, a smoother face of the oligarchy."