The opposite word of benefit is drawback. A benefit is something good for someone or something and a drawback is something bad for someone or something.
advantage, benefit, boon, luck
The opposite of benefit is unbenefit.
The opposite of benefit is harm, hurt, or disadvantage.
what word is opposite of prudent
The opposite of anything is it's absence. Silence would be the opposite of a word spoken.
which is the opposite to the word satisfaccion
This word does not have an opposite.
The opposite of the word "answer" is "question."
There is no opposite to cobble.
The word 'surf' does not have a opposite word.
Opposite word of light
If by 'opposite' you mean the word for someone of the opposite sex who has the same state or condition expressed in the word, then the opposite of 'bachelorette' is 'bachelor'.