• unsmilingy,
• unsmiling,
• ynsmilingly,
• hnsmilingly,
• jnsmilingly,
• insmilingly,
• 8nsmilingly,
• 7nsmilingly,
• ubsmilingly,
• umsmilingly,
• ujsmilingly,
• uhsmilingly,
• unamilingly,
• unzmilingly,
• unxmilingly,
• unsmilinly,
• unsmillingly,
• unsmilinglly,
• Unsmialingly,
• Unsmilliingly

• unassumingly,
• unassumingness,
• unassuming,
• unsnarling,
• unmasking,
• unsmiling,
• unknowingly.

The adjective form of "unsmilingly" is "unsmiling".

The plural form of the word "unsmilingly" is "unsmilinglies." However, it is worth noting that this word is not commonly used, and alternative phrasing may be preferred in most cases.

The singular form of the word "unsmilingly" is "unsmiling"