• orotoavis,
• lrotoavis,
• -rotoavis,
• 0rotoavis,
• peotoavis,
• pdotoavis,
• pfotoavis,
• ptotoavis,
• p5otoavis,
• p4otoavis,
• pritoavis,
• prktoavis,
• protovis,
• protovais,
• Prottavis,
• Proatavis,
• Proteavis,
• Prottovis,
• Pruoteavis,
• Proteovis

• protoplast,
• protoplasm,
• protohippus.

The adjective form of the word "protoavis" is "protoavian".

The plural form of the word "protoavis" is "protoavises".

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