• diff,
• wufy,
• duf,
• dtaff,
• surff,
• dsfa,
• draff,
• rouff,
• buffa,
• deff,
• thuff,
• suffi,
• deffo,
• arff,
• tuffy,
• suffy,
• ruffa,
• daef,
• offf,
• dsfdf

• huff,
• puff,
• dupe,
• dube,
• buff,
• dufy,
• cuff,
• dub,
• muff,
• duby,
• Duffy,
• ruff,
• Duffey,
• Duffie.

The adverb form of the word "duff" is "duffly".

The adjective form of the word "duff" is "duffish".

The plural form of the word "duff" is "duffs"

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