vs
QUICK ANSWER
"O" is a noun which is often translated as "la o", and "nought" is a noun which is often translated as "el cero". Learn more about the difference between "o" and "nought" below.
o()
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
nought()
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).