Okay! Let's think of a sentence with all three in!

If you want to CURE a disease, take the best herbal REMEDY or get TREATMENT from the doctor.  

remedy is a noun (like many nouns it can be used as a verb but not often)

cure is a noun and a verb

treatment is a noun and a verb

So, cure means that the illness is fixed, so I take antibiotics to cure the infection.

Treatment is just a process or procedure the body is taken through that may or may not result in a cure.  So I was given radiation treatment to help with my cancer.  There may be drugs involved but the treatment will encompase them and other things.

Remedy is a slightly old fashioned word and can refer to drugs or treatment that may or may not be affective or modern western medicine, it may also be just a pain reducer.  So, I took honey as a remedy for my sore throat.

I'm defiantly going to write this sentence down thank you

@moirawendy miller