roundness

(noun) the fullness of a tone of voice. Synonyms: rotundity. Example: "There is a musky roundness to his wordiness."

(noun) the quality of being round numbers. Example: "He gave us the results in round numbers, but their roundness didn't affect the point he was making."

(noun) the property possessed by a line or surface that is curved and not angular.

(noun) the bodily property of being well rounded. Synonyms: plumpness, embonpoint.