Yes, diseases is the correct spelling when referring to more than one (plural).
Example: There are many diseases in the world.
If referring to just one (singular), the correct spelling is disease.
Example: He has an incurable disease.
Diseases.
The word is spelled diseases.
The likely word is the plural noun diseases.
The correct spelling of the word is quarantine(isolation, as for contagious diseases).
I think the word you might be asking of is "decision". There is only one "s".
The word is spelled diseases. The root word is "ease" with the prefix "dis-".
Eat right, exercise frequently and learn how to spell heart.
It looks like you are trying to spell cat diseases.An example sentence is "cat diseases need to be treated by a vet".
pediatricsThe branch of medicine that deals with the care of infants and children and the treatment of their diseases.
Theword is likely one of these :DISEASE (noun) - a condition or afflictionDECEASE (verb) - to die (used as deceased, dead)
I think you are asking of the word "disease".
The plural form for the noun desk is desks.There are multiple desks in the classroom.