• tombaak,
• rombaugh,
• fombaugh,
• gombaugh,
• yombaugh,
• 6ombaugh,
• 5ombaugh,
• timbaugh,
• tkmbaugh,
• tlmbaugh,
• tpmbaugh,
• t0mbaugh,
• t9mbaugh,
• tonbaugh,
• tokbaugh,
• tombugh,
• tomabugh,
• toombaugh,
• tombauch,
• roxbrugh

• tombac,
• tombak.

The plural form of the word "Tombaugh" is "Tombaughs".

The singular form of the word "tombaugh" is "Tombaugh". It is a proper noun referring to the American astronomer Clyde Tombaugh.