• eoystonea regia,
• doystonea regia,
• foystonea regia,
• toystonea regia,
• 5oystonea regia,
• 4oystonea regia,
• riystonea regia,
• rkystonea regia,
• rlystonea regia,
• rpystonea regia,
• r0ystonea regia,
• r9ystonea regia,
• rotstonea regia,
• rogstonea regia,
• rohstonea regia,
• roustonea regia,
• ro7stonea regia,
• ro6stonea regia,
• royatonea regia,
• royztonea regia

The adjective form of "Roystonea Regia" is "Roystonea Regia". It is the scientific name of a specific species of palm tree, commonly known as the Cuban royal palm. Adjectives related to this species usually come after the word "Cuban" (e.g., Cuban royal palm, Cuban palm tree).

The plural form of "Roystonea Regia" is "Roystonea Regias".

The singular form of the word "Roystonea Regia" is "Roystonea Regia". This term refers to a specific species of palm commonly known as the Cuban royal palm or simply royal palm. It does not have a distinct singular form different from its scientific name.