Your member profile shows that you are an English teacher. I am sure, therefore, that you know how important it is to write correct English at all times. "s" is not a word and nor is "d". The words you are querying should stand out in some way - I have put them in quotation marks above but you could put them in bold or italics.
"Wards" is a plural noun.
"Hospitalised" is a form of the verb "to hospitalise".
Consequently, they are not similar at all so "What is the difference between ...?" is an inappropriate question. The only connection between them is that there are wards in hospitals.