Difference between Heir Presumptive and Redoubtable

HEIR PRESUMPTIVE vs REDOUBTABLE: NOUN

Someone who will inherit only if no better choice for an heir is born.
See heir apparent.
An heir who stands to inherit the estate, title, or office of an intestate ancestor, but whose claim can be defeated if a relative who is closer to the ancestor is born prior to the ancestor's death.
A person who expects to inherit but whose right can be defeated by the birth of a nearer relative

Eliciting respect or fear; imposing; awe-inspiring.
Formidable; dread; terrible to foes; ; hence, valiant; -- often in contempt or burlesque.
Worthy of respect or honor.
Arousing fear or awe; formidable.
Having or worthy of pride
Inspiring fear

Worthy of reverence.
That is to bo dreaded; formidable; terrible: as, a redoubtable hero; hence, valiant: often used in irony or burlesque.

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Frightening, Daunting, Lethal, Dreaded, Dreadful, Gadfly, Fierce, Fearsome, Proud, Alarming, Unnerving, Glorious, Respected, Illustrious, Formidable

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Frightening, Daunting, Lethal, Dreaded, Dreadful, Gadfly, Fierce, Fearsome, Proud, Alarming, Unnerving, Glorious, Respected, Illustrious, Formidable

He is the son of Eliwood, the main character of Fire Emblem: The Blazing Blade, and heir presumptive of Pherae.
Frenchman, that he is not heir presumptive to another crown, and that he has previously taken the civic oath.
Prince Albert became King George VI and the young Princess Elizabeth became heir presumptive to the throne.
Known as "The Brat" in the Heraldic Circle, the Heir-presumptive lives up to her nickname.
Roger was made lieutenant of Ireland and was declared heir presumptive to the Crown.

The redoubtable Class Secretary sent several interesting items to the Alumni Office recently.
One of the most active restorers was the redoubtable Susan Pringle Frost.
But you wouldn t do that, redoubtable and infamous as you are.
Had the redoubtable Best been miraculously converted by the grace of God?
Today, the Dniester River is as redoubtable as ever.
Young was a phenomenal linguist and redoubtable defender of Biblical inspiration.
Lee, and the lessons she learned from her redoubtable mentor.
Drill and dancing had been introduced by the redoubtable Mrs.
To the same redoubtable person another trait clearly belongs.
Western Hemisphere the only able and redoubtable champion!