• stunninlgy,
• stuningly,
• stunnigly,
• stunnily,
• stunninly,
• stunningl,
• atunningly,
• ztunningly,
• xtunningly,
• dtunningly,
• etunningly,
• wtunningly,
• srunningly,
• sfunningly,
• sgunningly,
• syunningly,
• s6unningly,
• s5unningly,
• stynningly,
• stunnningly

• steaming,
• staining,
• stunning,
• stoning.

The adjective form of "stunningly" is "stunning".

The plural form of the word "stunningly" is "stunninglies." However, it is not a common usage, and the word is typically used as an adverb without a plural form.

The singular form of the word "stunningly" is "stunning"