First, the meaning is different.
1.naught means: worthless.
Example:
What? Set? Where is it? Zero? Every one? Routine? Yes? Society. ?
He despises all social customs.
2. Zero means: zero; Zero degree (temperature, pressure, etc.); Minimum amount; Lowest point; Minimum level; not at all
Example:
That? At night? That? Mercury? Fell? Where to? Thirty? Degree? Below? Zero. ?
The thermometer showed that the temperature dropped to MINUS 30 degrees that night.
Second, the usage is different.
1. nough Usage: When used as a pronoun, it refers to plural or uncountable nouns or pronouns in the previous article or uncountable nouns or pronouns in the following article. It can also be used with comparative and than to mean "no one"
2. Usage of zero: When expressing "zero", zero is often used in technical terms and American English; In daily conversation, the British usually use zero (especially around the decimal point).
Third, the emphasis is different.
1. nought key point: nough is British English, which refers to the concept of "nothing".
2. Zero emphasis: more than zero represents the concept of "zero", such as "zero time".