• pacu,
• pucu,
• ouku,
• -uku,
• 0uku,
• pyku,
• phku,
• p8ku,
• p7ku,
• puju,
• pumu,
• puou,
• puiu,
• puky,
• pluku,
• pukku,
• Paku,
• Pucku,
• Pukoo,
• Pooku

• puig,
• pukka,
• pug,
• Pugh,
• puka,
• puzo,
• pus,
• push,
• pucka,
• puck,
• puga,
• puss,
• puce,
• puke.

The plural form of the word "puku" is also "puku".

The singular form of the word "puku" is "puku". The word remains the same in both singular and plural forms.