a gurney
Is a gurney. Or in the USA a trolley. A stretcher does not have wheels
The only English word I could find that meets the criteria is candleholder, but I am not sure it is a hospital helper.
Wheels
Another word for an insanity hospital is - an asylum.
Infirmary is another word for hospital.
Car is another word for truck that starts with a "c".
Another word for addition which starts with the letter N is New.
Another word for elevation is altitude.
Stretcher
Another word for water that starts with the letter 'O' is oxygen dihydrogen.
charm
Another word for a blimp that starts with a Z is a Zeppelin