• petrogal,
• oetrograd,
• letrograd,
• -etrograd,
• 0etrograd,
• pwtrograd,
• pstrograd,
• pdtrograd,
• prtrograd,
• p4trograd,
• p3trograd,
• petrigrad,
• petrogrd,
• pertograd,
• petorgrad,
• petrogard,
• petrograad,
• pulmograd,
• perorral,
• Petrogarad

• Petros,
• petterson,
• petrosino,
• petrous,
• petrogale,
• pedroso,
• Petruso,
• petters.

The adjective form of the word "Petrograd" is "Petrogradian".

The plural form of the word "petrograd" is "petrograds".

The singular form of the word "Petrograd" is still "Petrograd".