Currently the document that I have to rewrite has 'benefits' and 'disbenefits' as a title and this to me is not very good English.
Any help would be appreciated.
Pros and Cons
Advantages and Disadvantages
Suitable and Unsuitable Uses
Benefits and Cautions
Benefits and Caveats
Benefits and Limitations
Advantages and Limitations
Conveniences and Inconveniences
Not knowing the full content of the article you are attempting to title, it's hard to say which direction you might go in. Perhaps the form "plus and minus" can be changed to something totally different?
In any case, you're right; you absolutely must get rid of "disbenefits"!
Benefit <--> Detriment (American English)
Hope that helps.
"Detriment" is the most formal opposite of "benefit."
"Drawback" also works.
So does "con" as in "pros and cons."
It depends on where you are using that word. Are you using it in a business context, everyday "street-folks" context, or what?
In the former case, one probably use "cost" as the opposite of the word 'benefit.' I think everyone knows that a word in English can have many different meanings depending on the context and circumstances being used.