Is it possible to have 1-to-Many and 1-to-1 relationships for one specific table?

Is it possible to have 1-to-Many and 1-to-1 relationships for one specific table?

Because the database doesn't do what I wish for.

#_______________________________________________________________________________

class Altword(models.Model):

    #rosword = models.ForeignKey(Word)

    rosword = models.ForeignKey(Word, related_name='altword_rosword')

    alt_ros_word = models.CharField(max_length=200)

    wordy = models.OneToOneField(Word, related_name='wordy', primary_key=True)

    votes = models.IntegerField(default=0)

    pub_date = models.DateTimeField('date published')

    def __unicode__(self):

        return self.alt_ros_word

#_______________________________________________________________________________

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