• yacking,
• yaking,
• yakking,
• yikking,
• yackking,
• gakkings,
• hakkings,
• uakkings,
• 7akkings,
• 6akkings,
• yzkkings,
• yskkings,
• ywkkings,
• yqkkings,
• yajkings,
• yakkingz,
• yakkingsz,
• yackings,
• Yarkings,
• Yakingz

The plural form of "yakkings" is "yakkings" as the word is already plural.

The singular form of the word "yakkings" is "yakking"