What is the most common Word when referring to a bed? I.e., У меня есть две кровати? or is there a better word for the noun "bed"?
There are two different words in Russian:
- Кровать is the piece of furniture
- Постель is any place with the bedclothes lying on it (or even just the full set of bedclothes)
They are sometimes interchangeable though. "Я лежу в кровати" and "Я лежу в постели" mean the same.
There are also old words such as ложе or одр but you normally see them only in the books.
- Ложе (cf. "лежать" = to lie; "положить" = to lay) is an outdated poetic word for bed; in common speech it's still in use meaning stream bed or gun stock
- Одр is only usable as a part of the expression: на смертном одре = on deathbed
The most common word is кровать. You can use постель when you are talking about place prepared for sleep, as it was sayed above. Actually, as a native speaker, I can say that постель can sound a little bit too intimate, but this is my opinion, not the rule. Mostly these two words are interchangeable, for example, if yu say "Почему ты ещё в кровати, уже поздно?" it won't be a mistake, even if the person you are talking to is on the sofa.