case|noun|(court) a legal action; (medical) an incident of disease (&ldquo;There was only one case of chicken pox at the school.&rdquo;); an example of something (&ldquo;It was a case of a wrong decision&rdquo;); a box-shaped container used for transporting things; in case: conj. to guard against the possibility that.. (&ldquo;I will come in case you need me&rdquo;).
fluid|noun|any substance that can flow, such as a liquid
hospital|noun|a place where sick or injured people are given medical care
knife|noun|a tool or weapon used to cut
rate|noun|speed; a measure of how quickly or how often something happens; the price of any thing or service that is bought or sold
