Difference between Heir Presumptive and Generalissimo

HEIR PRESUMPTIVE vs GENERALISSIMO: 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

A supreme commander of the armed forces of a country, especially one who is also a political leader.
The chief commander of an army; especially, the commander in chief of an army consisting of two or more grand divisions under separate commanders; -- a title used in most foreign countries.
A commander-in-chief; the supreme commander of all the forces of a country, of several armies, or of an army comprising several corps or divisions acting separately.
The commander in chief of all the armed forces in certain countries.
The officer who holds the supreme command

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

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

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 descendant of William the Taciturn had received the powers of generalissimo of the Catholic King, the heir of Philip II.
In Vienna, the Austrian generalissimo who had led the Allied armies to triumph over Bonaparte at Leipzig.
Juan Carlos and Alfonso later continued their studies in Spain with the consent of Generalissimo Francisco Franco.
The Generalissimo, watching rather than listening, knew exactly what was going on.
The Generalissimo wanted him to take leave immediately, returning correspondingly earlier.
Allied generalissimo, is ready for an immediate invasion of Germany.
There develops immediately no Generalissimo in this step.
Grand Duke Nicholas proclaimed Generalissimo of Russian forces.