• jalapuya,
• malapuya,
• lalapuya,
• oalapuya,
• ialapuya,
• kzlapuya,
• kslapuya,
• kwlapuya,
• kqlapuya,
• kakapuya,
• kapapuya,
• kaoapuya,
• kalaphya,
• kalpauya,
• kallapuya,
• kalepuya,
• Kalpaya,
• Kalapoya,
• Kalaphua,
• Kalapiyo

• kalapooia.

The adjective form of the word "Kalapuya" is "Kalapuyan".

The plural form of the word "kalapuya" is also "kalapuya". The singular and plural form are the same.

The singular form of the word "kalapuya" remains as "kalapuya". It is a Native American tribe's name and does not change when referring to a single member of the tribe.