birthright (n.)

• appanage
• appurtenance
• authority
• bequest
• claim
• demand
• due
• entail
• faculty
• heirloom
• hereditament
• heritage
• heritance
• inheritance
• interest
• legacy
• patrimony
• perquisite
• power
• prerogative
• prescription
• pretense
• pretension
• primogeniture
• privilege
• reversion
• right
• succession
• title