Map<String,Schema.SObjectField> mapAccountFieldDescribed = Schema.SObjectType.Account.fields.getMap();

for(String strFieldName: mapAccountFieldDescribed.keySet())
{
    Schema.SobjectField  objfield = mapAccountFieldDescribed.get(strFieldName);
    system.debug('====name here==='+objfield.getDescribe().getName());
    system.debug('===is accessibility==='+objfield.getDescribe().isAccessible());
}