1. The state of being alone.

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

• knliness,
• lnliness,
• pnliness,
• 0nliness,
• 9nliness,
• obliness,
• onpiness,
• onoiness,
• onluness,
• onljness,
• onlkness,
• onloness,
• onl9ness,
• onl8ness,
• onlibess,
• onlimess,
• onlijess,
• onlihess,
• onlinwss,
• onlinsss

• fitness,
• holiness,
• heaviness,
• stillness,
• restlessness,
• effectiveness,
• weirdness,
• inclusiveness,
• loneliness,
• wellness,
• business,
• happiness,
• helplessness,
• wilderness,
• seriousness.

The adjective form of the word "Onliness" is "only".

The plural form of "onliness" is "onlinesses".

The singular form of the word "Onliness" is "Onliness".