The Collaborative International Dictionary
Smilingness
Smilingness \Smil"ing*ness\, n. Quality or state of being smiling.
And made despair a smilingness assume.
--Byron.
Wiktionary
smilingness
n. The quality or state of being smile.
Usage examples of "smilingness".
His heart actually leapt at the thought of the smilingness of fortune which had lavished upon him so much, that 'twould be rapture to him to lay at her feet.
Babbitt hinted with plump smilingness, "Does Paul get as tired after the winter's work as Georgie does?