• sinder,
• soner,
• soder,
• sander,
• somder,
• sonderer,
• sohnder,
• sundar,
• sondar,
• sondder

• plunder,
• ponder,
• thunder,
• squander,
• yonder,
• sunder,
• wander,
• chunder,
• blunder,
• wonder.

The adjective form of the word "sonder" is "sonderous". However, it is important to note that "sonderous" is not a commonly used word and may not be recognized by everyone.

The plural form of the word "sonder" is "sonders".

The singular form of the word "sonder" is "sonder". The word does not change in form from singular to plural.