• greeenroom,
• grenroom,
• greenroom,
• greenrooom,
• green room,
• grden room,
• freen room,
• vreen room,
• breen room,
• hreen room,
• yreen room,
• treen room,
• geeen room,
• gdeen room,
• gfeen room,
• gteen room,
• g5een room,
• g4een room,
• grwen room,
• grsen room

The adjective form of the phrase "green room" is "green-room". For example, you can say "a green-room atmosphere" to describe the atmosphere in a green room.

The plural form of the word "green room" is "green rooms".

The singular form of the word "green room" is "green room". It remains the same in both singular and plural form.