1. The state of being sulky.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• selfiness,
• siliness,
• sulleness,
• bulkyness,
• salkiness,
• supiness,
• sugainess,
• aulkiness,
• zulkiness,
• xulkiness,
• sulkines,
• sukliness,
• sulkyness,
• sulkaness,
• sultaness,
• spunkyness,
• suitiness,
• sutiness,
• auldnness,
• gulliness

• silkiness.

The adjective form of the word "sulkiness" is "sulky".

The plural of the "sulkiness" can be the "sulkinesses".

The singular of the "sulkiness" can be the "sulkiness".