1. The state of being lonely.

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

• lonelines,
• loneyness,
• lonelienss,
• lonlines,
• lonliness,
• lonlieness,
• lonelliness,
• loneleness,
• lonleiness,
• lovliness,
• lonilness,
• loliness,
• loneless,
• lonliless,
• lonlyness,
• lonleness,
• loneiness,
• lonelinesss,
• loneliess,
• lonelyiness

• liveliness,
• loveliness.

The adjective form of the word "loneliness" is "lonely".

The plural of the "loneliness" can be the "lonelinesses".

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