wa·ter·bed 
(wôtər-bĕd′, wŏtər-)
(wôtər-bĕd′, wŏtər-)n.
A bed with a mattress made of a tough plastic that is filled with water.
- know-how
- knowing
- knowingly
- knowingness
- know in the biblical sense
- know-it-all
- knowledgable
- knowledge
- knowledgeability
- knowledgeable
- knowledgeably
- knowledge base
- knowledge engineer
- knowledge engineering
- known
- know-nothing
- know-nothingism
- know one's place
- know place
- know (someone) in the biblical sense
- know someone in the biblical sense
- Knox
- Knox
- Knoxville
- Knt.