Aught and Nought

Aught noun - The numerical symbol 0 or the absence of number or quantity represented by it.

Nought and aught are semantically related in naught topic. In some cases you can use "Nought" instead a noun "Aught".

Nought noun - A mathematical element that when added to another number yields the same number.

Aught and nought are semantically related in nothing topic. You can use "Aught" instead a noun "Nought", if it concerns topics such as emptiness, naught.