Hello, Im getting this error when trying to populate a dropdown box with the account types.

System.NullPointerException: Argument 1 cannot be null  Class.AccountTypeController.getAccounts: line 13, column 1

Apparently 'Type' is a reserved word in apex but is also the API name of the Account field, Type. It won't return the field because of this. Any way around this besides changing the API name?

Apex code:
public class AccountTypeController 
{
    public string Account{get; set;}
    public String sortOrder = 'Type';
    
    
    
    public List<SelectOption> getAccounts()
    {
        List<SelectOption> AccountList = new List<SelectOption>();
        for(Account act: [SELECT Name, Type, Website, BillingAddress
                                              FROM Account])
            AccountList.add(new SelectOption(act.Type, act.Type));

        return AccountList;
      
    }
    
   
    
    public void sortByType()
    {
        this.sortOrder = 'Type';
    }

}

vf code:
<apex:page controller="AccountTypeController">
  <apex:form >
    <apex:pageBlock title="Accounts">
        <apex:pageBlockSection >
        
            <apex:selectList value="{!Account}" size="1">
                 <apex:selectOption itemLabel="-Select Account Type-" itemValue="-Select-"/>                     
                  <apex:selectOptions value="{!Accounts}"/>
                  <apex:actionSupport event="onchange" reRender="pb" status="actStatusId"> </apex:actionSupport>
            </apex:selectList>
        </apex:pageBlockSection>
    </apex:pageBlock>  
  </apex:form>
</apex:page>