dead
'Vanish' which means cease to exist.
The opposite word of celestial is terrestrial, which refers to things that relate to or exist on Earth.
I think you don't understand what a synonym or an antonym is. A synonym is a word that means the same or a similar thing to another word, while an antonym means the opposite. So exist is both a synonym and an antonym, depending on which word you are relating it to. Exist is a synonym for live, but exist is an antonym for, say, in a sense, the word void.
singleI am not sure that this is the opposite. A multiple is by nature a single or more, multiplied.When I sought the answer to the question, "What is the opposite of multiple?" I was looking for a word like "dividal" because the real opposite of "to multiply"would be "to divide", but it seems that word doesn't exist (yet).What about "dividend"?However "single" may have been the answer the original enquirer sought.
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
The opposite of the word "answer" is "question."
This word does not have an opposite.
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'.