So I've been searched online and can't seem to find a clear cut answer to this question.

From my understanding, the Nyquist rate is double of the maximum frequency of a signal which Nyquist frequency is half of the Nyquist rate.

Which would conclude that Nyquist rate is the lower bound of sampling and Nyquist frequency would be the upper bound where Nyquist rate is where you can preserve the original signal and anything in between the Nyquist rate to Nyquist frequency would cause some aliasing.

Is this correct?