Which is correct: guestroom or guest room or guest-room?

Google returns all three as words. Right now, I'm using, "guest room".

 

I would use "guest room" (two separate words). I just checked, and Merriam-Webster spells it with two words as well.

 

that's how i see it used most of the time and how i would write it/edit it...

 

Thanks! That's what I thought.

 

Guest room and guestroom are both correct. It's your choice.

 

I prefer "guestroom" because it fits with "bedroom" and "bathroom".

 

but 'dining room' and 'living room' and 'sitting room' are still 2 words...

 

Compare the two sets:

Guestroom, bedroom, bathroom: all private areas.

Dining room, living room, sitting room: all communal areas.

It makes more sense to group guestroom with the first group.

 

if you say so..................