Is "schizoid" a nickname for schizophrenia, or are they two differently nuanced things?

The sub description says: "Schizoid personality disorder is a condition where a person shows very little, if any, interest and ability to form relationships with other people. It's very hard for the person to express a full range of emotions. If you have schizoid personality disorder, you may be seen as keeping to yourself or rejecting others."

And if we're talking about schizophrenia, there's a whole lot more to the illness than simply distancing themselves from people, right?